I'm looking for a certain set of exhaust manifolds but I can't seem to locate them. A buddy of mine tipped me off to these and I need to find a set. He said he thought they came off a 91 formula firebird, but wasn't 100% sure. I have the casting numbers, is there anywhere I can look to find out what car they came off?

The LH manifold is 10168544
The RH manifold is 10223614

PLEASE help, I want to find a set just like his!

 

Comon guys, put your thinking caps on!

 

Junk yards, classifieds on this Board, eBay. www.partsamerica.com , look for Motormite p/n's 674518 & 674519

 

My question is, what car did those manifolds come on? If I know what car, then I can find one at a junkyard or somewhere else. But I need to know what car they came on first!

 

'86-'90 TPI cars, whether 305 or 350. '91-'92 cars with dual cats.

 

I found a set off an 85 IROK 305 TPI but the numbers don't match. They are:

LH GM #14094063
RH GM #14094064

Whats the difference between them?

 

'85 was the last year of the four-bolt catalytic converter and y-pipe, so the manifolds were matched to them.

'86 and up had a different style cat. You would want any exhaust manifolds off a 87-92 350 TPI or 305 TPI with dual cats. Those would be the "hi-po" versions with the largest outlets.

I personally do not know about 86-89 TPI 305's, but I would trust five7kid's info.

Keep in mind you need the y-pipe to go with these manifolds, as the other y-pipes will not bolt up.

 

Thanks for the info, these are going on a race car, so I don't need any y pipe.

 

too bad i didnt see this a while back as i threw away exactly what you are looking for. they came off my 91 L98.

out of curiousity, why are you running stock manifolds for a race car? special rule requirements? if so i would just get whatever manifolds you can find and have them extrude honed to increase flow.

 

Its a dirt circle track car. The rules say you have to run cast iron manifolds and you can't run the center dump type. What car does a 91 L98 come in?

 

my 91 L98 came in my 1991 trans am.

 

you have a pm

 

I have a set of manifolds, # 14094063 and # 14094064. They are the ones included in the GM 350 HO conversion package offered for 82-87 camaros. see link below.

http://www.gmpartsdirect.com/perform...ATID=1099.html

they are painted high temp aluminum and are missing one collector bolt. i'd like $60 plus shipping.

 

Thanks man, but I'm really trying to find the ones with the casting numbers from above.

 

Come on guys, someone's got to have a set that I'm looking for.

 

i got some 86 tpi exhaust manifolds. how much do u wanna pay for them. u pay the shipping and you can have em for like 20 bucks. ill check the serial numbers on em once you email me back

 

I have a pair of manifolds off my 91 Z28 i'm willing to get rid of.

Justin