Thirdgen Header option chart - explained
#101
Member
Join Date: Apr 2004
Location: Hialeah/Mia.
Posts: 346
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1990 350 tbi l98,
Engine: 5.7 tbi
Transmission: t5
I was looking over the thread and wanted to know why headman shorty headers can not be installed, With a mini starter? I have that combo and it fits purfect. Just wanted to throw that out. Thanks -Eric
#102
TGO Supporter/Moderator
Thread Starter
iTrader: (12)
Join Date: Jul 1999
Location: SALEM, NH
Posts: 11,724
Likes: 0
Received 89 Likes
on
75 Posts
Car: '88 Formula, '94 Corvette, '95 Bird
Engine: LC9, 355" LT1, LT1
Transmission: T5, Zf6, 4L60E
Axle/Gears: 3.42, Dana44 3.45, 3.23
Originally posted by 90tbi305
I was looking over the thread and wanted to know why headman shorty headers can not be installed, With a mini starter? I have that combo and it fits purfect. Just wanted to throw that out. Thanks -Eric
I was looking over the thread and wanted to know why headman shorty headers can not be installed, With a mini starter? I have that combo and it fits purfect. Just wanted to throw that out. Thanks -Eric
-- Joe
#103
Junior Member
Join Date: Aug 2004
Location: Michigan
Posts: 59
Likes: 0
Received 1 Like
on
1 Post
Car: 91 Camaro RS
Engine: 5.7
Transmission: 700R4
Axle/Gears: 3.73
Need hedders
I have a 91 camaro with a 350 tbi. What would be a good set of hedders and y-pipe for my car? i am having a hard time trying to find hedders to fit my car. Thanks Gregg
#104
Member
Join Date: Apr 2004
Location: Hialeah/Mia.
Posts: 346
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1990 350 tbi l98,
Engine: 5.7 tbi
Transmission: t5
Originally Posted by anesthes
I wanna see pictures.
-- Joe
-- Joe
hers a pic of the mini starter,headman shorty headers, headman y pipe.
#105
TGO Supporter/Moderator
Thread Starter
iTrader: (12)
Join Date: Jul 1999
Location: SALEM, NH
Posts: 11,724
Likes: 0
Received 89 Likes
on
75 Posts
Car: '88 Formula, '94 Corvette, '95 Bird
Engine: LC9, 355" LT1, LT1
Transmission: T5, Zf6, 4L60E
Axle/Gears: 3.42, Dana44 3.45, 3.23
Originally Posted by 90tbi305
hers a pic of the mini starter,headman shorty headers, headman y pipe.
This is a mini starter..
#107
TGO Supporter/Moderator
Thread Starter
iTrader: (12)
Join Date: Jul 1999
Location: SALEM, NH
Posts: 11,724
Likes: 0
Received 89 Likes
on
75 Posts
Car: '88 Formula, '94 Corvette, '95 Bird
Engine: LC9, 355" LT1, LT1
Transmission: T5, Zf6, 4L60E
Axle/Gears: 3.42, Dana44 3.45, 3.23
Originally Posted by 90tbi305
this is a pic of the strater when it was out side of the car.
What model # starter is it?
-- Joe
#108
Supreme Member
iTrader: (1)
Join Date: Feb 2003
Location: check under the car
Posts: 1,143
Likes: 0
Received 4 Likes
on
3 Posts
Car: White 25th Anniversary RS
Engine: lt1
Transmission: t56
Axle/Gears: 4:10
Just read this whole thread from a-z Its a great thread except for the random injector debate right in the middle. LOL Just had a question on the 1 5/8 hedman. Are they choking my lt1 in anyway? Im in the middle of a possible upgrade but trying to decide if i need it. I have the hedmans and was wondering if i would see any real gain by going to 1 3/4 slp. by gain i mean 10 or more hp.(see sig 4 info) Im about to do the y pipe mod and if i understand it correct you just hack it off at the section were they join together and weld in 3'' from there back. correct?
BTW if any one has problems with the install saggy motor mounts and shortys dont mix well. caused my hedmans to tap my frame and throw off my ignition timing.(ks)
Thanks,
Jeff
BTW if any one has problems with the install saggy motor mounts and shortys dont mix well. caused my hedmans to tap my frame and throw off my ignition timing.(ks)
Thanks,
Jeff
#109
Supreme Member
iTrader: (3)
Join Date: Jan 2006
Location: Flowood,MS
Posts: 1,489
Likes: 0
Received 0 Likes
on
0 Posts
Car: 87 IROC Z
Engine: 5.7 L98 TPI
Transmission: 700r4,2500 stall
Axle/Gears: G80,10 bolt 3.42's
had a question about the flowtechs.did you see any gains from them?I bought them because of price amd hoped they would be good atleast for a little while,my tpi intake is pretty much stock.any help would be greatly appreceiated.im hopeing to upgrade my intake soon and then go with a better header
#110
TGO Supporter/Moderator
Thread Starter
iTrader: (12)
Join Date: Jul 1999
Location: SALEM, NH
Posts: 11,724
Likes: 0
Received 89 Likes
on
75 Posts
Car: '88 Formula, '94 Corvette, '95 Bird
Engine: LC9, 355" LT1, LT1
Transmission: T5, Zf6, 4L60E
Axle/Gears: 3.42, Dana44 3.45, 3.23
Originally Posted by 92rs85berlintta
Just read this whole thread from a-z Its a great thread except for the random injector debate right in the middle. LOL Just had a question on the 1 5/8 hedman. Are they choking my lt1 in anyway? Im in the middle of a possible upgrade but trying to decide if i need it. I have the hedmans and was wondering if i would see any real gain by going to 1 3/4 slp. by gain i mean 10 or more hp.(see sig 4 info) Im about to do the y pipe mod and if i understand it correct you just hack it off at the section were they join together and weld in 3'' from there back. correct?
BTW if any one has problems with the install saggy motor mounts and shortys dont mix well. caused my hedmans to tap my frame and throw off my ignition timing.(ks)
Thanks,
Jeff
BTW if any one has problems with the install saggy motor mounts and shortys dont mix well. caused my hedmans to tap my frame and throw off my ignition timing.(ks)
Thanks,
Jeff
On my next project (C4 vette), i'll probably go with a hooker supercomp 1 3/4.. I don't know why hooker refused to make a short 1 3/4" for fbody.
The hedmans were ok, and I ran some of my fastest times with them and the 355. (119-120mph in the 1/4).
The only issue is, are your hedmans d-port to match your LT1 heads?
-- Joe
#111
Supreme Member
iTrader: (1)
Join Date: Feb 2003
Location: check under the car
Posts: 1,143
Likes: 0
Received 4 Likes
on
3 Posts
Car: White 25th Anniversary RS
Engine: lt1
Transmission: t56
Axle/Gears: 4:10
The only issue is, are your hedmans d-port to match your LT1 heads?
had a question about the flowtechs.did you see any gains from them?I bought them because of price amd hoped they would be good atleast for a little while,my tpi intake is pretty much stock.any help would be greatly appreceiated.im hopeing to upgrade my intake soon and then go with a better header
flowtechs are pretty much like your stock setup. I had them on my old setup with no noticed gains so i trashed them and went to the hedmans. hedmans are cheap enough and work 100x better than the flojunks. My advice is if they are new to return them and buy the hedman.
#112
Senior Member
Join Date: Sep 2004
Posts: 878
Likes: 0
Received 1 Like
on
1 Post
Car: 89' Iroc-Z G92
Engine: TPI 305 G92
Transmission: T-5
Axle/Gears: Limited 9 bolt, 3.45
Are these worth a dime and any idea on what I would have to cut and what convertors/ exhaust sytem I should use.. I want to get the 305 into the 13's with it.
As is 100% stock, TPI 305, T-5, Dual Cats, Fake Dual Exhaust, 3.45's.
I need to stay emissions legal, but the only thing that pisses me off is the factor that they aren;t tuned.
EDL-68762
http://store.summitracing.com/partde...0&autoview=sku
As is 100% stock, TPI 305, T-5, Dual Cats, Fake Dual Exhaust, 3.45's.
I need to stay emissions legal, but the only thing that pisses me off is the factor that they aren;t tuned.
EDL-68762
http://store.summitracing.com/partde...0&autoview=sku
Last edited by Mcdamit; 04-25-2006 at 03:37 PM.
#113
Member
Join Date: Nov 2005
Location: Bromley south east london, England
Posts: 148
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1987 pontiac trans-am
Engine: 350 tpi
Transmission: 700R4
Axle/Gears: 3;73 with eaton lsd
i have hedman headers and y pipe on my 350 tpi (87) and just thought id share somethig with you lot!! nice power gain when i had them installed (inititialy a 305. gave me about 20-25 bhp) but so far ive gotten through about three sets of gaskets!? i think the problam being that the head side of the flange is not flat and every time i tighten up the bolts it cuts into the gasket and then the gaskets crumbles away causing a VERY anoying 'ticking'! is there any good headers with a flat flange?
#114
Supreme Member
iTrader: (2)
I had an issue with the driver’s side flange of mine, the center 2 tubes would leak with just the supplied gasket but I added one of the individual port style metal foil gaskets to the middle ports (I think I put a little copper rtv between it and the supplied gasket also) and bolted it down and it was fine for like 11 years…
#115
Supreme Member
iTrader: (7)
Join Date: Jan 2006
Location: Santa Rosa, Cali
Posts: 1,160
Likes: 0
Received 1 Like
on
1 Post
Car: 1988 IROC 5.7 Money Pit
Engine: (being built; modified TPI ZZ4
Transmission: 2200 stall/ stage 3 700R4
Axle/Gears: freshened 3.27 in 9.bolt/
Re: Amassing header info into one well put together list....
.....Would you be willing to tackle the Corvette Ram's Horn style of headers for alegedly much better installation and less babysitting????? Nitro
#117
Supreme Member
iTrader: (7)
Join Date: Jan 2006
Location: Santa Rosa, Cali
Posts: 1,160
Likes: 0
Received 1 Like
on
1 Post
Car: 1988 IROC 5.7 Money Pit
Engine: (being built; modified TPI ZZ4
Transmission: 2200 stall/ stage 3 700R4
Axle/Gears: freshened 3.27 in 9.bolt/
corvette factory headers...
If the factory units hit, are there any other type of 'Ram-Horn' design manifolds that do fit our F bodies???
Nitro
Nitro
#118
Junior Member
iTrader: (2)
Join Date: Jul 2006
Location: Florissant, (STL) MO
Posts: 83
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1985 Camaro Z28
Engine: LT1
Transmission: 4L60e/SS3600
Axle/Gears: S60/4.30/Spool
So from what I have read on this thread 2055's are the way to go, but I just got a free set of coated 2460's that the previous owner never even bolted on. So I was thinking that getting a dual 2.5 to 3 flowmaster y pipe mounted back where that converter was and attach to undecided cat back system. Sound like a good set up? I shouldnt have a problem getting two 2.5 pipes through there? Thanks for the info.
#119
Member
iTrader: (2)
Join Date: Jun 2006
Location: Dallas, TX
Posts: 181
Likes: 0
Received 4 Likes
on
3 Posts
Car: 1982 Z-28
Engine: 5.7L Crossfire
Transmission: TH-350
Axle/Gears: GM Posi, 3.73
You can solve the warped flange issue by cutting the flange. Cut it between the front primary tube and the second primary tube and between the back (4th) primary tube and the third tube. This allows the front and rear tubes to "float" and allows you to tighten down the three sets of tubes without affecting the others. I traced the tick problem on my Hedmans to a warped flange as well. I also installed a ministarted with the Hedmans.
My .02 on header selection. 1 3/4 is generally too large on a street driven car. This has been discussed extensively on the FirstGen website and the most common recommendation is 1 5/8 up to 500HP. I support a 438 RWHP supercharged 355 with a set of Hooker 1 5/8 primary headers (3-inch collectors) with a dual 2.5 inch exhaust in my 69 Camaro.
The only benefit you get from shorties is better flow than the stock cast iron manifolds. Since the tubes are far away from being equal length, there is no scavanging effect. You *might* make the same amount of power with ported or Extrude-honed stock manifolds.
My .02 on header selection. 1 3/4 is generally too large on a street driven car. This has been discussed extensively on the FirstGen website and the most common recommendation is 1 5/8 up to 500HP. I support a 438 RWHP supercharged 355 with a set of Hooker 1 5/8 primary headers (3-inch collectors) with a dual 2.5 inch exhaust in my 69 Camaro.
The only benefit you get from shorties is better flow than the stock cast iron manifolds. Since the tubes are far away from being equal length, there is no scavanging effect. You *might* make the same amount of power with ported or Extrude-honed stock manifolds.
#120
Member
iTrader: (2)
Join Date: Jun 2002
Location: Labrador City, Newfoundland, Canada
Posts: 168
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1991 Z-28
Engine: 305 TPI
Transmission: 4L60
Axle/Gears: 3.73
Like to post this info for us 91 and 92 owners that was provided to me the hooker 2055 that only list on Summit for 86 to 90 3ed Gen:
Hooker only lists those applications for which the headers bolt into the stock exhaust. In 1991, the factory went from a single 3" cat to dual 2-1/4" cats for the "high performance" system. The single cat was only 2-1/4". The 2055 y-pipe doesn't directly fit either the dual cat or single 2-1/4" cat, so the listing only goes to 1990.
If you're willing to change your cat(s), the 2055's will fit in all other ways.
Hooker only lists those applications for which the headers bolt into the stock exhaust. In 1991, the factory went from a single 3" cat to dual 2-1/4" cats for the "high performance" system. The single cat was only 2-1/4". The 2055 y-pipe doesn't directly fit either the dual cat or single 2-1/4" cat, so the listing only goes to 1990.
If you're willing to change your cat(s), the 2055's will fit in all other ways.
#122
Supreme Member
iTrader: (7)
Join Date: Mar 2000
Location: Orange, CA
Posts: 5,674
Likes: 0
Received 106 Likes
on
65 Posts
Car: '90 Trans Am-12.45@110.71
Engine: 355 w/AFR 195's Elem. 400/430 HP/TQ
Transmission: Tremec T-56
Axle/Gears: 12 Bolt 3.73
I ones I make are better than any that have been mentioned.
3/8th" thick one piece flanges, 1 3/4" tubes, raised ports (for new syle heads), no clearance issues, 2 1/2" ball and socket collectors, coated and only $450 you do have to make the mandrel Y-pipe as stated earlier.
See here https://www.thirdgen.org/forums/sout...3-finally.html
3/8th" thick one piece flanges, 1 3/4" tubes, raised ports (for new syle heads), no clearance issues, 2 1/2" ball and socket collectors, coated and only $450 you do have to make the mandrel Y-pipe as stated earlier.
See here https://www.thirdgen.org/forums/sout...3-finally.html
Last edited by Dyno Don; 03-24-2011 at 11:04 AM.
#123
#124
Supreme Member
iTrader: (1)
Join Date: Feb 2003
Location: check under the car
Posts: 1,143
Likes: 0
Received 4 Likes
on
3 Posts
Car: White 25th Anniversary RS
Engine: lt1
Transmission: t56
Axle/Gears: 4:10
Im def getting a set of D D headers when i figure out what im gonna do for a y pipe. For the price they are best for our cars and i cant wait till i order them.
#125
Junior Member
iTrader: (2)
Join Date: Jul 2006
Location: Albany Ga
Posts: 42
Likes: 0
Received 0 Likes
on
0 Posts
Car: 92 Camaro RS
Engine: 350 .030 over compcam 12-212-2
Transmission: T350
Axle/Gears: Borg/Warner 9 bolt 3.70
nice set of headers, and the way you did the dual cats, but i am not going back dual cats.
#126
Supreme Member
iTrader: (2)
You can solve the warped flange issue by cutting the flange. Cut it between the front primary tube and the second primary tube and between the back (4th) primary tube and the third tube. This allows the front and rear tubes to "float" and allows you to tighten down the three sets of tubes without affecting the others. I traced the tick problem on my Hedmans to a warped flange as well. I also installed a ministarted with the Hedmans.
My .02 on header selection. 1 3/4 is generally too large on a street driven car. This has been discussed extensively on the FirstGen website and the most common recommendation is 1 5/8 up to 500HP. I support a 438 RWHP supercharged 355 with a set of Hooker 1 5/8 primary headers (3-inch collectors) with a dual 2.5 inch exhaust in my 69 Camaro.
The only benefit you get from shorties is better flow than the stock cast iron manifolds. Since the tubes are far away from being equal length, there is no scavanging effect. You *might* make the same amount of power with ported or Extrude-honed stock manifolds.
It’s not hard to see how even the worst of the shory tubular headers, and the hooker and the headman headers that we’re discussing are sometimes referred to as shorties, which I usually refer to as ¾ length headers because they do tend to have primaries and collectors that are long/distinct enough to make a difference in how the engine runs.
Where I totally disagree is that the primaries have to be equal length to have any scavenging effect (clearly proven with mustang shorties and with the minimal HP differences between other wise identical equal and non). Secondly, there is no way that you will make the same power with heavily ported manifolds that you would make with the worst shorties.
#127
Supreme Member
iTrader: (2)
I ones I make are better than any that have been mentioned.
3/8th" thick one piece flanges, 1 3/4" tubes, raised ports (for new syle heads), no clearance issues, 2 1/2" ball and socket collectors, coated and only $450 you do have to make the mandrel Y-pipe as stated earlier.
See here https://www.thirdgen.org/forums/sout...3-finally.html
3/8th" thick one piece flanges, 1 3/4" tubes, raised ports (for new syle heads), no clearance issues, 2 1/2" ball and socket collectors, coated and only $450 you do have to make the mandrel Y-pipe as stated earlier.
See here https://www.thirdgen.org/forums/sout...3-finally.html
They look just like a set of the hookers with air tubes and thicker flanges added.
What are they? You don't mention a name or anthing anyhwere that I saw...
#130
Supreme Member
iTrader: (1)
Join Date: Feb 2003
Location: check under the car
Posts: 1,143
Likes: 0
Received 4 Likes
on
3 Posts
Car: White 25th Anniversary RS
Engine: lt1
Transmission: t56
Axle/Gears: 4:10
I think he Did it to perfect the problems with the 700$ headers and offer us more options. IE They fit without denting, collectors are bigger, there coated and 1 3/4. After reasearching Dons headers they are the best shorty made for the thirdgen handsdown. Looks dont sell headers funtionality does
#131
Moderator
iTrader: (14)
Join Date: Mar 2000
Location: Littleton, CO USA
Posts: 43,169
Likes: 0
Received 35 Likes
on
34 Posts
Car: 82 Berlinetta/57 Bel Air
Engine: LS1/LQ4
Transmission: 4L60E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
1) The y-pipe is a terrible piece. 2-1/2" after the "Y". Restrictive. Is intended as an LO3 off-road manifold/y-pipe/cat replacement. Would require expensive modification in order to make it acceptable.
2) The cost of the 2460HKR's and y-pipe is about $50 less than 2055HKR's before you modify the 2460HKR y-pipe. After you spend the bucks to do that, you're over the price of 2055HKR's, which you can bolt in.
----------
Another available header to add to the list is the Dynomax 88733. 1-5/8" primary, 3" collector, y-pipe included. At the time of this writing, they are about $100 more from Summit than 2055HKR's. Haven't seen a pic of them, don't know what the y-pipe looks like.
2) The cost of the 2460HKR's and y-pipe is about $50 less than 2055HKR's before you modify the 2460HKR y-pipe. After you spend the bucks to do that, you're over the price of 2055HKR's, which you can bolt in.
----------
Another available header to add to the list is the Dynomax 88733. 1-5/8" primary, 3" collector, y-pipe included. At the time of this writing, they are about $100 more from Summit than 2055HKR's. Haven't seen a pic of them, don't know what the y-pipe looks like.
Last edited by five7kid; 01-09-2007 at 02:10 PM. Reason: Automerged Doublepost
#132
Member
iTrader: (7)
Join Date: Jun 2004
Location: Lincoln, Missouri
Posts: 156
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1980 Regal
Engine: 383 Superram
Transmission: 700R4
Axle/Gears: 12 bolt w/ 3.31 posi
I have the 1.75" headers on my iroc. I like them alot, but like a lot of people say, they are expensive. As expected with the larger primaries they did not bolt up to the heads with ease. If you have A/C then it is even more fun. I had to bolt mine up like you put a puzzle together. To help out I am using a couple different style header bolts. On the drivers side one of the primaries was touching the steering. Couldn't do anything but dimple the tube a little. Also moved one of the brake lines to the inside of the steering shaft to get it away from the headers. I am using a moroso oil pan, which is larger than the stock one, so clearance around the pan, y- pipe, and factory k- member was "VERY" tight. Almost nonexistent. Pretty good header even with the fitment issues. Howerver, if I had it to do over I would have bought the 1.625" version so the header bolts would install easier.
#133
Junior Member
Join Date: Feb 2007
Posts: 1
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1992 Chevrolet Camaro RS
Engine: L03 TBI 305
Transmission: 700R4
Re: Thirdgen Header option chart - explained
Just wondering... is having your headers/y-pipe ceramic coated worth it? I've had to replace the stock y-pipe on my '92 RS 305 three times and I'm willing to try anything that will dramatically increase the life of the headers once I decide to purchase them.
#134
Re: Thirdgen Header option chart - explained
There is allot of information on the headers of this thread.
I am building a bracket 86 camaro. It is strip down, all interior,all a/c and heater, wiring and so on has been removed. I am only going to have a sbc in it for about a year at first. My question is I would like to used long tube headers, what would be the best way to go. How will the long tubes fit with out every thing in the way. The engine is only going to have about 300hp and will used a 350 turbo, with all of the stock suspension in place for now. We are going to a full tube chassie with bbc at the end of next year. So just trying to get by for now...Thanks
I am building a bracket 86 camaro. It is strip down, all interior,all a/c and heater, wiring and so on has been removed. I am only going to have a sbc in it for about a year at first. My question is I would like to used long tube headers, what would be the best way to go. How will the long tubes fit with out every thing in the way. The engine is only going to have about 300hp and will used a 350 turbo, with all of the stock suspension in place for now. We are going to a full tube chassie with bbc at the end of next year. So just trying to get by for now...Thanks
#135
Member
iTrader: (1)
Join Date: Nov 2006
Location: Charmhaven, Australia
Posts: 240
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1999 subaru forester GT (urgh)
Engine: ej20 turbo
Transmission: 5speed
Axle/Gears: 4.11:1 awd
Re: Thirdgen Header option chart - explained
I have summit shorties (flowtechs) and there were clearance issues on both sides. Crappy fitment, the collectors were les than 1/8" away from the crossmember on both sides. I wish the collectors were centred in the space away from everything.
#136
Member
iTrader: (2)
Join Date: Jan 2007
Location: Cherryville, NC
Posts: 169
Likes: 0
Received 2 Likes
on
2 Posts
Car: 92 Camaro RS
Engine: 5.7L 385 Fastburn
Transmission: 700R4
Axle/Gears: 9 Bolt 3.70 Gears
Re: Thirdgen Header option chart - explained
I recently purchased a t3/t4 hybird turbo. The end that connects to the header is rectangular. While regular headers are round. Which type headers would perform the best and if possible wht dual exhuast system would accomidate great headers and a turbo? I've never dealt with turbos and seem to not be able to find anyone i know that truly knows what they are donig when it comes to hooking it up. I definately dont want to blow my car to peices so any help on the best headers for the prices please send my way.
email is GMODUDE@aol.com or just reply on this thread.
email is GMODUDE@aol.com or just reply on this thread.
#137
Senior Member
Join Date: Apr 2003
Location: Albany GA
Posts: 595
Received 0 Likes
on
0 Posts
Car: '90 RS Vert
Engine: 305 TBI
Transmission: 700-R4
Re: Thirdgen Header option chart - explained
I can't speak factually about the purported underhood temperature savings as I did not do before and after measurements when I replaced the stock manifold.
I can tell you that the exhaust coming out the back of the car feels hotter than it did before...
The main reason to get ceramic coating on your headers is the heat issue. Your question deals more with rust... I got my headers and Y pipe coated. They have been on the car for about 4.5 years now and have not changed color. Were they not coated I would expect them to be red with rust...
When I replaced my exhaust system it was with the intention of not having to do it again for a LOOOONG time. I got ceramic coated headers going into a SS steel cat and then a SS steel catback...
The short answer to your question is Yes, Ceramic coatings are worth the investiment.
Speedy
#139
Junior Member
Join Date: Jul 2008
Location: Cornwall, ON
Posts: 7
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1986 Trans Am
Engine: 350
Transmission: T5
Axle/Gears: G80 4.10
Re: Thirdgen Header option chart - explained
anesthes you might want to update the Headman part #'s as this thread is a sticky.
The new ball and flange Y-pipe that goes with the 68470 hedders is actually 17478.
(The old collector style is 17470 as I found out today when it wouldn't fit the hedders)
The new ball and flange Y-pipe that goes with the 68470 hedders is actually 17478.
(The old collector style is 17470 as I found out today when it wouldn't fit the hedders)
#140
TGO Supporter/Moderator
Thread Starter
iTrader: (12)
Join Date: Jul 1999
Location: SALEM, NH
Posts: 11,724
Likes: 0
Received 89 Likes
on
75 Posts
Car: '88 Formula, '94 Corvette, '95 Bird
Engine: LC9, 355" LT1, LT1
Transmission: T5, Zf6, 4L60E
Axle/Gears: 3.42, Dana44 3.45, 3.23
Re: Thirdgen Header option chart - explained
Thanks for the heads up!
-- Joe
#142
Member
Join Date: Dec 2006
Location: Riverside CA,
Posts: 106
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1982' camaro Z/28
Engine: lt-1 out of a 95' impala ss
Transmission: viper spec t-56
Axle/Gears: Ford 9in 3.90 gears
Re: Thirdgen Header option chart - explained
ow about doug's 3321's? i just found these headers going through my summit catalog and im very tempted on going with them $599 coated longtubes 3/8's flanges. the only thing is im wondering if theyll work with a manual trans?
#143
TGO Supporter/Moderator
Thread Starter
iTrader: (12)
Join Date: Jul 1999
Location: SALEM, NH
Posts: 11,724
Likes: 0
Received 89 Likes
on
75 Posts
Car: '88 Formula, '94 Corvette, '95 Bird
Engine: LC9, 355" LT1, LT1
Transmission: T5, Zf6, 4L60E
Axle/Gears: 3.42, Dana44 3.45, 3.23
Re: Thirdgen Header option chart - explained
-- Joe
#144
Junior Member
Join Date: May 2009
Posts: 29
Likes: 0
Received 0 Likes
on
0 Posts
Car: 84 trans am
Engine: 305HO(L69)
Transmission: T-5
Axle/Gears: 3.73 posi
Re: Thirdgen Header option chart - explained
i put a jegs catback on my t/a and i think it sounds pretty nice. 3in intermidat pipe and 2.5in outlets. i would like to get rid of the cat and put a nice y-pipe and shortyes on it but i cant find anything cheap (under $400) im also afraid of breakin bolts in the head when i go to take the headers off. the jegs catback was only like 270 with out shipping i think it was a pretty good deal
#145
Re: Thirdgen Header option chart - explained
What you want to do is ditch the dual cat setup, get a 3" mandrel cat back (like hooker, dynomax, etc). Get the 2055's or whatever headers that are 3" after the y. get a high-flow cat (carsound, extremeflow, arvin, etc) and have a good day.
Do you mean it's best to ditch the whole 2 cats... and have the Y from the headers lead into one pipe with one 3" cat and then the catback?
Currently I have crap headers and a Flowmaster muffler and er.. modified cats. But I'm planning on ripping the whole thing out and doing probably Dyno Don headers and a catback system (maybe Borla, because I heard Magnaflow is very (ie too) quiet with the system I am planning)... but was on the fence on how to handle the cats. From this it sounds like I should ditch them have have one?
#146
Junior Member
Join Date: May 2009
Location: I'm from hawaii, but I've been going to school in Grand Forks, ND for four years now
Posts: 20
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1989 Camaro, 1991 Firebird
Engine: 305 in the chevy, 350 in the bird
Re: Thirdgen Header option chart - explained
What are some thoughts on eddlebrock headers? I like mine but I'm gonna be going through my engine and showing it up a bit and the ones i have look pretty old so i was considering a switch other are significantly better in performance
#147
Re: Thirdgen Header option chart - explained
I am running a set of Hedman Elites to a Hedman Y pipe on a Ram Jet 350 in an 1988 Camaro. The RamJet uses Vortec heads. The clearance seems very tight on the Drivers side and almost touches the bottom of the AC airbox on the passenger's side. How big of a problem is this and has anyone found a good solution? I think I have less than 1/8", before I put a heat shield in. Hedman said there are spacers from Transdapt that would raise the engine, but that seems like the wrong direction. Ideas?
#148
Supreme Member
iTrader: (7)
Join Date: Mar 2000
Location: Orange, CA
Posts: 5,674
Likes: 0
Received 106 Likes
on
65 Posts
Car: '90 Trans Am-12.45@110.71
Engine: 355 w/AFR 195's Elem. 400/430 HP/TQ
Transmission: Tremec T-56
Axle/Gears: 12 Bolt 3.73
Re: Thirdgen Header option chart - explained
I'm sure I'm being an idiot (and n00b) here, but better to be thought of as an idiot here than to waste a big chunk o money in the long run ..
Do you mean it's best to ditch the whole 2 cats... and have the Y from the headers lead into one pipe with one 3" cat and then the catback?
Currently I have crap headers and a Flowmaster muffler and er.. modified cats. But I'm planning on ripping the whole thing out and doing probably Dyno Don headers and a catback system (maybe Borla, because I heard Magnaflow is very (ie too) quiet with the system I am planning)... but was on the fence on how to handle the cats. From this it sounds like I should ditch them have have one?
Do you mean it's best to ditch the whole 2 cats... and have the Y from the headers lead into one pipe with one 3" cat and then the catback?
Currently I have crap headers and a Flowmaster muffler and er.. modified cats. But I'm planning on ripping the whole thing out and doing probably Dyno Don headers and a catback system (maybe Borla, because I heard Magnaflow is very (ie too) quiet with the system I am planning)... but was on the fence on how to handle the cats. From this it sounds like I should ditch them have have one?
Add this up if you will....most cats are the same dementions so, do you want all 8 cylinders going thru one, or 4 cylinders thru each?
#149
Junior Member
Join Date: Aug 2009
Location: Cleveland Ohio
Posts: 2
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1983 Camaro
Engine: 305 HO for now
Transmission: 5 spd
Axle/Gears: 373
Re: Thirdgen Header option chart - explained
Hello my name is Gene im new to the site and have an exhaust question i have an 83 camaro factory 305 5 spd but i replaced then engine and trans with a rebuilt 1976 350 and 350 trans why wont the 305 exhaust manifolds bolt up and will headers from a 1981 camaro fit thanks alot i appreciate any help i can get
#150
Supreme Member
iTrader: (1)
Join Date: Feb 2003
Location: check under the car
Posts: 1,143
Likes: 0
Received 4 Likes
on
3 Posts
Car: White 25th Anniversary RS
Engine: lt1
Transmission: t56
Axle/Gears: 4:10
Re: Thirdgen Header option chart - explained
Hello my name is Gene im new to the site and have an exhaust question i have an 83 camaro factory 305 5 spd but i replaced then engine and trans with a rebuilt 1976 350 and 350 trans why wont the 305 exhaust manifolds bolt up and will headers from a 1981 camaro fit thanks alot i appreciate any help i can get
The only header that will work are 82-92. I would ditch the manifolds while you got them out if you can. Try headman headers and y pipe setup, it should work fine with your stock 350 and they can be found used fairly cheap.