I have another Exhaust question. I have a 1982 T/A with a Cross-Fire Injected 5.7l V8. it has a couple mods. i have edlebrock headers that end in 2 1/4" that are already installed. and i am planning on getting a cat back system. Im pushing about 300hp. Should i go to 2 1/2" or 3" or is 2 1/4" fine for my car. Thanks


RED82TA5.7L

 

You can get a system from Hooker that is 3 inches for the entire exhaust, other than the last 2 inches of intermediate pipe where it snakes down to 2 1/2 inches meet the cat.

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1987 Chevy Camaro IROC-Z
L98 TPI 350 (5.7L)
TH 700R-4 Transmission with 2.77:1 Rear End

Current Mods: Edelbrock TES 1 5/8" Headers, Hooker Aerochamber Cat-Back System, Performance Resource Chip with 160* Thermostat, Accel Ignition Components, K&N Filters, All Free Mods, Falken ZIEX Z-Rated Tires.

Best ET : 14.3 @ 97mph
(corrected for elevation)

 

Thanks... but my catylitic converter is 2 1/4" and the y-pipe from the headers is 2 1/4". is it really nessasary to go to 2 1/2" or 3". i dont have that much money to spend. i just want to know if i have to go to 2 1/2" or 3". Thanks

RED82TA5.7L

 

Hooker makes several versions of their cat-back...I believe my exhaust was 2 1/4 (stock 305tbi exhaust) and the intermediate pipe went down to connect to the stock cat..the rest of it was 3"

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Tom
Black '91 RS 305TBI
My Web Page

 

Thanks. I found a Hooker cat-back with the aero chamber muffler for $199.00 and its 3" and it says it will fit my engine code. That is what im going to get. a muffler shop was going to charge me $300 for a cat-back with flowmasters but that didnt come with tips. and it was press bent. The hooker cat-back is mandrel bent for better flow and it comes with tips.. Thanks


RED82TA5.7L

1982 Pontiac Trans Am
Cross-Fire Injected 5.7L V8
Edlebrock Headers, Glasspack after the cat but soon to be Hooker Cat-Back with Aero Chamber Muffler
Mods: 1.6 Proform Roller Rockers, Electric Fan....

Future mods: X-Ram( Aftermarket Cross-Fire Injection Manifold that proves to have as much power as TPI www.x-ram.com )
Cross-Fire Injection after market chip that says that it will proform like 90's injections.. http://www.turbocity.com/CorvetteCro...ECMUpgrade.htm