I have a bought stock TBI Camaro. The TPI cars got a little better exhaust. Some got single cat, some got dual cat, some got higher flow upturned EXH manifolds, some had larger collectors than others.

What is the history on this???

I am attempting to get a pair of the upturned larger diameter 350/305TPI factory EXH manifolds for a single cat. Even thought this is not SLP headers, it is a whole lot better than what i have from what i understand.

Mike

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1988 Camaro Sport Coupe305TBI-4spdAOD-2.73open in "bought stock" condition. That'll change if it stays around here much longer

 

For all the hassle of removing your exhaust manifolds and installing the new ones, its not worth it. You'll gain at the most 3-5 HP, if that. Unless you like bleeding knuckles and swearing, just save up and get headers instead. They'll be worth the skinned knuckles.

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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=-

 

if you are interested I have the factory L98 manifolds and 3in single cat Y-pipe. If you are interested the price is right.
britain.hirte@beale.af.mil is my address

 

I got stock L98 manifolds and 3in cat if you want them Price is free there sitting in my attic.

 

I definately agree with Mike.
If you are investing that much time and effort definately get the headers.

Especially if the upper end of the engine has been or will be modified. Otherwise, with a factory style manifold, you will only see a fraction of the gain that something like a nice cam could produce.

I'm looking at headers and I don't want to spend a lot. Heddmann sell a set of painted headers for about $100 and a Y pipe that would let you use the rest of your stock exhaust which also sells for about $100.
Personally, I don't really care if they rust.
As long as they generate MORE TORQUE.

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Black 1989 RS Convertible w/43,000 mi.
Excellent Condition
LO3 305 w/TBI
Open Element 14x3 K&N
Hypertech Thermomaster
160 Degree Thermostat
Low Temp Fan Switch
Eddlebrock Performer Muffler
No Cat
B&M Stage 2 Shift Kit
17"x9" ATP 5 Spoke Alloys
P 245/45 Goodyear Eagle
HP Ultra Plus Tires
Lakewood Rear Control Arms

 

hey you have any part numbers on those headman headers?

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1988 IROC 305TPI MINT!!
Mods= Accell SuperCoil, MSD 6A, Ported Plenum, No MAF Screans , K & N, 160 Thermostat+ Temp Switch
And Always Trying To Go Faster