i have a 91 350 that has dual cats. so are there no headers at all that will fit up to the stock pipes like the manifolds do? or is there just none at all?

my question is do the hooker 2055's fit on a carb 305 or only tpi's? and what is the outlet diameter of the y-pipe?

thats how yor gettin any real power

yes hooker does make a ypipe for 2460 shorty headers 16767hkr fits perfect, and also ties into a cat back system without adapters if you pay attn to the flage style on the ypipe and cat back unit you order , 82 z28 350, 2460-3hkr, 16767hkr , dynomax 289-17391 perfect, fit !!

After reading 2 header threads, I have some questions...

I am seeing on the hooker 2055's, you have to have to use shortie spark plugs, and/or make custom tool to remove the plugs.

Anyone with hedman 68470/17478 combo have any input on the spark plug situation?

Does the ceramic 68481, work with the 17478 y-pipe?

What I would like to know is. What is SLP? And I am reading this and havent seen anything on long tube headers. My 82 camaro doesnt set as low as my 83 Z28 did, So what would I have to do in order to have then work? ie steering. It looks like I have room and they were free.

SLP=street legal performance. I am running their 1 3/4" shorties and had to move by steering over about 1/4".

See I dont get that. Even with shorties you still had to move the steering? This is my second camaro but the first 1 I will add headers to. It is a 82 berlanetta and I am putting the finishind touches to this week. Not anything but very mild HP stuff. I have a set of long tubes that I got for free from a 2nd gen camaro, I was thinking to see about fitment with those. Has anyone here tried block hugger type headers? Any problem with those?

Will switching over to a Tubular K-member increase header & Y-pipe clearances and fitment?

I'm soon to pull my old l98 to make way for a new 355. Am I still going to have to ding/dent/ or notch stuff for fitment if I go the tubelar route?

It's been my past experience that header's that lack clearance either bang and clank in bumps or deep corners or else the lack of clearance places preasure on a tube during hard cornering and it cracks. So they need a bit of room.

I've got my entire suspension tied down tightly, but it's a T-top car and it will still flex; in addition; I don't want to transfer all that creaking and popping plus road noise into the drivers cabin.

Any serious thoughts on this? Thanks, Nitro

I have an 84 Tran Am that I'm dropping in a 350 crate motor making 400+ HP. The motor comes with 64cc vortec heads with straight plugs. I'm looking for a set of headers that will work with straight plugs. Can anyone help?

Hooker headman both fit. You will have to run header plugs because stock plugs are to long.

I have a set of Hedman 68470 headers on my 86 camaro and i kept the regular length spark plugs. I did have to put on a newer smaller starter and bend a few brake lines out of the way though.

And.....it seems like the spark plug socket fit on 6 of the plugs, but I had to tighten two of them with a wrench. They were waay easier to change than the plugs in my 86 K10.

i put a gm 350 crate engine in my 85 firebird. i just a set of hedman headers from a guy on ebay, they have the O2 provision, they are shorty's and i am told they are made for my model of car. Am i gunna have to change my starter, move any brake lines or my a/c bracket?

also, more importantly, how can i modify my original y pipe to fit my shorty's? can anyone explain a cheap way to do this? what difficulties will i come across?

does anyone know where i can buy a cheap y-pipe for 85 firebird with hedman shorty's?

what kind of long tube witll fit on my 84z with a 5speed and any modifications needed

I CAN'T START NEW THREADS YET, HAVE TO ASK HERE.
THis thread might be too old, I need to know what manifold/y-pipe is compatible with the third gen Camaro.
#1 will any manifold/ypipe from 5.0 or 5.7 fit my motor, whether it be a TPI or LT1 motor?
#2, what about 4th gen cars?

If you know who I should ask on THirdgen.org, please direct me to someone that might help me.
Eddie in Taylor, Michigan.

I have a set of flowtech headers 11108 and was wondering if they would bolt up to my 1991 camaro RS with a 305 TBI.

Hello, I am new to this site and would like to know if the 2055's will fit my 1991 TPI 350 Z28 with no issues. Car will be equipped with a crate 350 HO motor with vortec heads. I found out that I could not use the stock manifolds because one bolt hole will not line up on the pass side head. Will the 2055 bolt right up? What else will I need to mod on exhaust/plugs/starter etc... for this crate set up? Car is equipped with dual cats right now so I presume I will need to go with one cat instead. Please feel free to send me PM if you can explain better over the phone. I'll respond with my phone number or just post here. Thanks

Rey

so some things have definitely changed in my project. For one, I have a different car!
An 89 Iroc with a 406. I spent well over 3 hours just to do ONE SIDE...... had a few header bolts missing. I didn't know there was high quality copper gaskets in there. I didn't have to remove it! But I did, and after loosening up the collector on the passenger side, I removed the header gasket from the engine, cleaned it up, and it was a TRIP getting the back bolts back in. I had to get the back bolt in from UNDERNEATH the car. I learned a lot from this, and it's experience and should be easier next time. I'll try to keep them tight so I don't have to replace that bolt again.

Hey, without reading this entire thread, can anyone tell me who makes BBC headers that will fit on my 86 Iroc?

Thanks. Is that all that is available? Ceramic coated?

what do you have to say about the pacesseter headers and y- pipe for thirdgens i bought a pair with the y-pipe from a member on here and never been used just bolted on and they are carb legal with air tubes but i like the slp brand over the pacesseter should i just stick with these or get the slp headers i seen the tri-y that i liked with matching y-pipe

VERY useful thread, thanks! But there is some wrong info. There is a Y-pipe available for the 2460. Its the 16767: http://www.summitracing.com/parts/HOK-16767HKR/

Am I the only one who thinks that the OP needs to be edited and updated? A lot of missing or outdated headers, plus the "chart" is non existent.

Since the site has disallowed HTML for years, the tables are broken. I don't have the time to convert it all to be easily displayed.

-- Joe

The age of this thread is complicating. Is it feasible to just delete it and start from scratch?

thinking about doing the same thing. Anyone have the answer to this question?

Just about convienced on the dyno dons, I am going to re-read the difference between the hookers & dyno's.

Also if I am remove my catalytic converter will I see more power gains then if I leave it? & will be alot louder?

Thanks.

The 2055's fit just fine and work on all SBC Gen1 heads as far as I know. I haven't seen a SBC that doesn't use the standard 6bolt exhaust setup. There are two extra bosses on the edges, but those usually aren't used, and definitely aren't used on the 2055s.



You can remove the cat in your area if you don't have emissions testing, however the legality of it is questionable. its illegal in IL, even if you are no longer equipped for emissions testing in your area (IL240 test) you still must retain emissions equipment to pass a visual if a police officer wants to look. You should really post in your area on the boards and see what other people in Texas have run into regarding emissions, I can only speak for Illinois as that's all I have experience with.

Removing the cat will not do alot to increase the Decibel reading of the exhaust, but it will increase the rasp as less of the higher frequencies will be muffled. You'll get more snap/crackle/pop from the exhaust.

Thanks, I will be keeping the cat then. I don't really like the raspy sound.....

Didn't read the whole thread so I'm not sure if its already been mentioned but I'm not sure you're correct about the Hooker 2460's. I have them installed on my car with a Hooker Y pipe that bolted up without modification. So there are certainly Y-pipes available for this model.

why do some websites say that Hedman 68470's won't work with angled sparked plugs?

Are there any exhaust headers that would directly fit a stock '86 trans am, without any welding or Y-pipe modifications? Just bolt it on and connect the O2 sensor.

I removed the AIR system from my car and now I'm trying to get new exhaust headers with the least headache possible.
Also, welding is prohibited in the garage where I keep my car.

The "y-pipe" that is more of a "t-pipe" is the biggest problem. That is the first thing that needs to go.

I do not know of any that are direct fitment in-place of the stock manifolds.

Decided to make a new thread for my questions concerning headers and the y-pipe:

https://www.thirdgen.org/forums/exha...ml#post5702269

Car: 1986 Firebird Trans Am
Motor: Swapped 305 TPI for 350 vortec with rpm airgap and holley DP

What kind of headers should I go with? I need something lower price but not crap. Also something that would involve minimal pipe bending to match up to Y-pipe. The goal is headers-y pipe-straight pipe back to flow master muffler. Does block style matter or do most sbc motor exhaust ports match?
Help please. looked though posts but could not get clear answer.

THANK YOU

Any header listed in this thread. Its not rocket science considering that the Vortec 350 is a SBC gen 1 block same as the engine that came in the thirdgen.

So any thirdgen V8 specific header will work.

Look at your budget, and pick what fits.

Im about to purchase a 1991 RS, and Im probably gonna add long tube headers. These ones are kinda spendy, but are they worth it over the flowtech laying around I got? Doug's Headers
D3321-R

Throw the flow tech away, they are useless in my experience. Those Doug's are nice, they are 1/2 inch larger primary than the flow tech. This leaves the door open to real performance later on. If you use flow tech your just going to end up replacing them later, been there, done that.

If your not dead set in lt headers look at dyno dons shorty headers.

Aren't Long tubes better for low end performance? Or oposite, and once i get the car i'll post a exhaust clip, sounds pretty stout already, i dont know the muffler its got, but im guessing 2 1/2 all the way out with some sort of flow master. And speaking of that, should i go cat back or just get a custom y-pipe for the exhaust on it now to save money... Or pay some more an get a custom y-pipe an a good flowing exhaust catback system?

Long tubes breath better all the way around but are better than shortys up top. A 3 inch would be most desirable if you plan on adding more power later.

Curious on if the Sticky Header list would work for me..
I have a 1996 block with Vortec heads I want to install in my 1985 Trans Am....
Should all the headers listed above work for my block?
Thanks!

Are there any shotty y pipes that will work with the hedman shotty other than the hedman y pipe? I don't want to replace 2.25 tubing with more 2.25. Wondering if the Doug's headers or hooker y pipes will fit?

In Post # 1 of this 17 year-old thread information for a "chart" was posted.

So, 17 years later, after struggling to read the information, I created a "chart", using the same data, for "easy reading".

Still relevant... We get header questions a lot in my third gen club's FB group.

To everyone,

Feel free to use my chart, anytime . . . If it helps someone, I am happy !