D@MN I AM SO PISSED OFF RIGHT NOW! When I bought my Edelbrock cat back system Edelbrock stated that it had true 2.5 inch dual outlets. I measured them and they are more like 2 3/8 inch. Total false advertising B.S. Now here's what really gets me. I have their TES for the single 3 inch cat and it's supposed to have 1 5/8 inch primaries. Well I measured them. Two pipes on each header are 1 5/8 inch and the others are 1 1/2 inch! What the hell! Man I checked like 8 times and i'm not wrong. That's false advertising and bull. Not only that but they weld on the inside of the header and reduce the exhaust port to between 1 inch and 1 1/4 inch ID. Man Fu(k Edelbrock. I wish I had bought SLP!

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84 Camaro ZZ4 with HOT cam. 1.88 60' (12.98 @ 105MPH E.T.)
Other Mods: You name it and I have probably changed it.

91 Firebird 5.0L TBI

ASE Certified Auto Tech
LIVE AND DIE BY THE ALMIGHTY BOWTIE!

 

If you will read the info on the TES headers you will find that they have what is known as "dual diameter" primaries. This means that the primaries are 2 different sizes. This is used to increase torque on the smaller displacement small blocks over the standard 1 5/8" primaries used by other companies. As for the tailpipes being 2 3/8" instead 2 1/2" are you measuring from the inside diameter or the outside diameter? The thickness of the metal is probably the difference you're seeing.

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Mongoose-NCTGA-1990 Pontiac Formula/305 TBI-700R4 with Edelbrock Performer TBI intake,TES headers,and STB,K&N,MSD-6AL,Holley laser shot coil,Accel Extreme 9000 wires,Jet Stage 2 chip,TCI shift kit with corvette servo,Richmond 3.73 gear with Auburn 3 series posi,no cat,SLP 3" cat back,Eibach sportline springs,Energy Suspension poly throughout,Lakewood LCA and adjustable panhard bar package,SSM subframe connectors,IROC wonder bar,Tokico 5 way adjustable struts and shocks,Autometer electric fuel pressure gauge,Alpine,JL Audio,MB Quart,92 GTA taillights,92 GTA aero wing and hatch,Steve Spohn LCA relocater kit,MacEwen White face gauges,84 T/A cold air induction air cleaner.

 

Mongoose, man i'm telling you they are not dual diameter primaries! Certain pipes are 1 5/8 inch and others are 1 1/2 inch. The tail pipes were measured from the OD(outside diameter), they are just flat small. I am beyond dissapointed. I'm speechless as to why Edelbrock would mislead me.

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84 Camaro ZZ4 with HOT cam. 1.88 60' (12.98 @ 105MPH E.T.)
Other Mods: You name it and I have probably changed it.

91 Firebird 5.0L TBI

ASE Certified Auto Tech
LIVE AND DIE BY THE ALMIGHTY BOWTIE!

 

CamaroMike, that is what "dual primaries" mean... certain primaries are 1 5/8" and others are 1 1/2".

 

Yeah, I have them too and I'm about to throw them away. I haven't decided weather or not to go w/ the SLP's or the Hooker super comps. If I go w/ the Hookers, I'l have to weld the EDel A.I.R. rails onto them. What do you guys think?

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Justin 87 GTA--organizer: "NY2K" Gathering. Blk/Gld w/Superam, 355cid Trickflows, forged pistons 9.5:1. Auto 2,600 stall, 3.45 9 bolt disc, Best time & mph 13.567 @ 101.900 w/ a poor 60ft. Best mph: 104.3 *This car is 100% NYS emissions legal, w/ all emissions controls!* "If you want to have a fast car, hang out w/ those who do!"
http:// www.community.webtv.net/munks87/JustinsGTApage.com

 

Dual Schmooll, Step Up header or whatever you call it it's B.S. Edelbrock lies about their headers being 1 5/8 inch primaries. Show me some literature stating that Edelbrock headers come with "Dual Primaries". Those lying cheating b@stards!

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84 Camaro ZZ4 with HOT cam. 1.88 60' (12.98 @ 105MPH E.T.)
Other Mods: You name it and I have probably changed it.

91 Firebird 5.0L TBI

ASE Certified Auto Tech
LIVE AND DIE BY THE ALMIGHTY BOWTIE!

 

whats the deal with promoting SLP so much....first you dog on hooker then you dog on edelbrock...both times promoting SLP to be the farmost superior headers. hookers been around since the 60s making awesome headers ever since and edelbrock is by no means a "HEADER" company...more of a performance company. they make great headers for there price. SLP makes great headers too but they cash in on gullible people like yourself

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Rick
90 Camaro RS 305 TBI
400 small block, Hooker 1 3/4 LTs, Random Tech Cat, Hooker aero chamber cat back on the way!!
TH700-R4 with Trans-Go shift kit (corvette servo here...but not installed yet)
MacEwen Motorsports White Gauge Overlays
14" K&N X-Stream Open Element
GTS Headlight and Taillight covers
5% Limo Tint all around
Classic White Chevy Bowtie sticker on rear window
http://www.geocities.com/esvalenz

Man if my camaro were a rice-rocket all those mods would give me what...easily 50-60 hp!!!

"Just because I've done it, doesn't mean I knew what I was doing!" - Me

 

Where did I bash Hooker? SLP is the only company that will make a high quality LARGE exhaust for an affordable price.

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84 Camaro ZZ4 with HOT cam. 1.88 60' (12.98 @ 105MPH E.T.)
Other Mods: You name it and I have probably changed it.

91 Firebird 5.0L TBI

ASE Certified Auto Tech
LIVE AND DIE BY THE ALMIGHTY BOWTIE!

 

https://www.thirdgen.org/messgboard/...ML/000536.html
the hookers come with a y-pipe. so do the edelbrocks. also the hooker long tubes flow better than the slp 1 3/4 shorties any day. and since when is SLP the most affordable?

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Rick
90 Camaro RS 305 TBI
400 small block, Hooker 1 3/4 LTs, Random Tech Cat, Hooker aero chamber cat back on the way!!
TH700-R4 with Trans-Go shift kit (corvette servo here...but not installed yet)
MacEwen Motorsports White Gauge Overlays
14" K&N X-Stream Open Element
GTS Headlight and Taillight covers
5% Limo Tint all around
Classic White Chevy Bowtie sticker on rear window http://www.geocities.com/esvalenz

Man if my camaro were a rice-rocket all those mods would give me what...easily 50-60 hp!!!

"Just because I've done it, doesn't mean I knew what I was doing!" - Me

[This message has been edited by Black Beauty (edited December 20, 2000).]

 

Try pricing Hooker Long Tubes (Super Comp) and mufflex stuff. Now thats expensive. I thought you meant this post thread and yes in that other thread I did state Hooker made a poor exhaust on that one application. Almost all exhaust for thirdgens is CR@P! Show me where I can get 1 3/4" primary non AIR shortie headers with a pre-fabricated 3.5" or larger y-pipe that goes into a 3.5" or larger cat back. That's what I thought YOU CAN'T! Case closed.

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84 Camaro ZZ4 with HOT cam. 1.88 60' (12.98 @ 105MPH E.T.)
Other Mods: You name it and I have probably changed it.

91 Firebird 5.0L TBI

ASE Certified Auto Tech
LIVE AND DIE BY THE ALMIGHTY BOWTIE!

 

I've been saying that for a long time now about Edelbrock's headers. Its my opinion, and I've seen both headers side by side, that SLP makes the best emissions legal headers for thirdgen f-bodies. I also firmly believe they are worth the higher price.

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1991 Camaro Z28
5.7L 5-Speed (originally 305)
13.25 @ 107.18 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Webmaster: SoCal F-Bodies
-=ICON Motorsports=-

 

Having dealt with numerous aftermarket companies, and seeing various fit, finish, and completeness levels, I will typically go for the higher end product. I've just had better luck doing so. Edelbrock makes a good product, but, find somebody that specializes in third-gen parts and your typically going to find better stuff. SLP just happens to be one of those companies.

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Torque is KING!
All pray to the god of grunt! When ye thinkth ye has been whupped than shall ye meet the mighty Buick! For none can surpass her majestic power, and all will yet try. All pray to the god of grunt. For the King of torque has arrived!
1. 82 Camaro+ 1. 455" Buick+ 1. N2O plate = YOUR WORST FRIGGIN NIGHTMARE!!!
Da Problem Child
ProbChldR@aol.com

 

Dual Primaries! ROTFLMAO!
They su(k! BWAHAHAHA!

Sorry, I am just glad to see some opinions that agree with mine.

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84 Camaro ZZ4 with HOT cam. 1.88 60' (12.98 @ 105MPH E.T.)
Other Mods: You name it and I have probably changed it.

91 Firebird 5.0L TBI

ASE Certified Auto Tech
LIVE AND DIE BY THE ALMIGHTY BOWTIE!

 

I have the SLP 4-2-1-y-pipe design. They've got to be pretty old. So far so good, the stainless is holding up better than I could have imagined. I don't have a garage or even a paved driveway. NJ winters are pretty bad with the salt and I just think stainless is the only way to go. As for performance I can't really say since I haven't had much experience with edelbrock. I know they make great intake manifolds. On the other hand I've heard that there heads are overpriced, and the carbs are a pain. They do make good suspension parts (STB and LCA/panhard). It's just what the company is good at. They do make a lot of different headers so they couldn't be aweful. Then there is SLP though...specialty is CHEVY and they've probably just capitalized on some older designs and tweaked them to be a better product. I've heard a lot about the collectors/y-pipe and how the edelbrock double D section isn't as good for scavaging as the SLP dual tube "normal" design. Why is it that edelbrock is the only header to use that D shape? Don't you think if it was a better design that other company's like headman and hooker would look into it and design something very similar? They don't and why do you think? Maybe it was just one of those shortcuts edelbrock could take in making the manufacturing process cost less since less welds or something.
What I'm trying to get at is that maybe edelbrock isn't the BEST headers but they make superior intake manifolds and other things. It's what happens when a company holds rights to a design. It leaves all the performance gauging up to us since all company's have there own special designs. It's funny like that. So what we need is somebody to get both and install the full exhaust and then dyno run a couple engines (305 -> 502) and figure the flywheel hp. If somebody could do that I think we could end this little PITA.

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, Jon (91 RS too many mods to list), getting new engine in summer

 

I have the TES's and Catback and LOVE it

 

Of course you love it. TES headers work. They give your car more power. But if you traded them for a set of SLP's, you'd love your car even more. SLP headers work better.

 

Maybe we need to do the following to end this endless discussion.
Call SLP or we get some friendly engine shop with an engine dyno to help us.
We get an 3rd gen style engine i.e. 305-350 cu in with no more than 325 hp.
Then have them conduct 2 dyno sessions
1. with the TES
2. with the SLP
This will give us the true potential of each headers POWER output.
I know stainless and steel, durability and all that. put this would answer the performance questions. Battle of the 1 5/8 headers.
Just an dumb idea. See Ya

 

Kevin, I could not agree more!

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84 Camaro ZZ4 with HOT cam. 1.88 60' (12.98 @ 105MPH E.T.)
Other Mods: You name it and I have probably changed it.

2001 Dodge Ram Quad Cab 5.9L 4*2

ASE Certified Auto Tech
LIVE AND DIE BY THE ALMIGHTY BOWTIE!

 

I would say no one makes headers like Edelbrock because it just might have something to do with that patent thing they have on them.
I own a set, the only real complain I have is the funky note they hit around 2500rpm,, due to the design I'm guessing.
Hooker and Heddman seem to be the only 2 companies that don't seem to be big headed about the price of what they make. There is only one design that will really work in our cars since space is at a premium under the hood,, how much better do you really think the same design can be just because you paid more (not talking fit/finish) ?
Edelbrock makes (and patented) their design because they researched and engineered what they thought made the best power and wasn't the same thing as everyone else.
SLP has uses no new ideas on designing exhaust but makes a quality product because they use stainless and most likely have people that have worked for them for a long time.
No matter what you buy for these cars you have to pay out your a$$ for it because it's pay or have the great gm cast iron manifolds.
I've gotten sh-tloads of bad products,, You can't help a company not being able to keep or get good workers,, that's becoming a rariety.
If you don't like the headers,, simply box them up, send them back, and get a new pair. If you're that pissed off,, call Edelbrock and tell them what you think,, how are they going to know they are doing something wrong w/o feedback ?

Just my $.02 rant/opinion
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My Firebird & other stuff

- 4 out of 5 people think the 5th is an idiot

[This message has been edited by deadbird (edited December 30, 2000).]

 

The exhaust situation for these car is just very frustrating! Pay alot or recieve cr@p and none of this "performance exhaust" will support a HOT engine over 400HP! Although there is the exception that Mufflex will support big HP but it eliminates ground clearance.

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84 Camaro ZZ4 with HOT cam. 1.88 60' (12.98 @ 105MPH E.T.)
Other Mods: You name it and I have probably changed it.

2001 Dodge Ram Quad Cab 5.9L 4*2

ASE Certified Auto Tech
LIVE AND DIE BY THE ALMIGHTY BOWTIE!

 

This is ridicolous.

You're acting like your whole .00009th of an inch is restricting your car 1,000 Horse Power.

Get a life dumbass.

[This message has been edited by Supercharged85 (edited January 02, 2001).]

 

Im not sure whoever thought up this 4" exhaust B.S. makes more power for my 350 Horsepower Beast, but they are dumb as hell.

4" is WAY too much exhaust for anything breathing under 1500 horsepower. There is no need for a 4" exhaust. Your car might have 400 horsepower and could probably used MAYBE 3" exhaust, and hell, youd probably be losing low end torque with that. Ive got True Dual 2.5" exhaust on my 85 camaro, and its plenty. Ive worked at an exhaust shop for 3 years and my dad has owned his own shops for nearly 25 years now. Ive had my cars on dynos and tried different things. Ive had the mufflex 4" exhaust and its a POS on the dyno but does sound MEAN. I prefer my 2.5 true dual Spintech exhaust over that any day.

 

Supercharged, I would like to have true dual 2.5" pipes but WE ARE STUCK WITH A SINGLE PIPE! If you would do some math you would realize that a single 3.5" pipe is the same cross sectional area as dual 2.5" pipes. So according to your theory my single 3" pipe is huring me, I APPRECIATE YOUR SUPPORT! I remember stating in this thread that I would like a single 3.5" pipe. Oh by the way on a 435HP engine like I HAVE a single 3" pipe with small primary headers will choke out about 20-25HP. Now were back to what I said earlier Edelbrock sucks if you want to expand your engine in the future. I bought my TES before I had my 350 and did not realize at the time (two years ago) that I had such little expansion room with these headers. I paid 800 bucks to port my heads and install larger valves, all negated by headers and an exhaust pipe that is too small. Oh yeah, get a book on exhaust and you will realize that 1 5/8" headers are good for 400HP and 1 3/4" are for 400+HP. How come almost all small block chevy dyno tests are performed with 1 3/4" headers. HMMMMMMMMM! Check your mags.

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84 Camaro ZZ4 with HOT cam. 1.88 60' (12.98 @ 105MPH E.T.)
Other Mods: You name it and I have probably changed it.

2001 Dodge Ram Quad Cab 5.9L 4*2

ASE Certified Auto Tech
LIVE AND DIE BY THE ALMIGHTY BOWTIE!

[This message has been edited by CamaroMike (edited January 04, 2001).]

 

I have the 1 3/4 inch Slps with no air.Ive owned the edelbrocks,while they are a good design for STOCK,or close to it,one other reson to get the SLPs are the rust issue,the edlelbrocks seem to rust very fast up north,expect to replace them after 2 years.I think you only option would be to get the SLPs,and run a good size catback.I wouldn run the Muffles y pipe for the simple reason it would nt pass initial visual emmisions inspection,no to mention lost ground clearence.

 

Hey supercharged85

Finally somebody tells it like it is.

BRAVO ! ! !

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Chronologically challenged. But still alive!
92 CAMARO RS
305 TBI 5/spd (now TPI)
'69 camaro
BB/Lenco
1050 dominators
8.97-150+
Pump gas/no drugs