Factory N10!
Joined: Aug 1999
Posts: 492
Likes: 0
From: Aurora, ON, Canada
Car: 1989 Iroc-Z
Engine: 5.7L TPI
Transmission: 4 Spd Auto
The factory exhaust is pretty good, especially with the dual cat setup. You could always add a catback exhaust. Its not like u would gain considerable power from dropping the dual cats.
Joined: Aug 1999
Posts: 492
Likes: 0
From: Aurora, ON, Canada
Car: 1989 Iroc-Z
Engine: 5.7L TPI
Transmission: 4 Spd Auto
Well I've always been a fan of flowmaster but there really is alot of brand and different sizes of catbacks which sound and perform differently.
Joined: Jul 1999
Posts: 10,950
Likes: 26
From: Orange, SoCal
Car: 1990 Pontiac Trans Am
Engine: 355 TPI siamesed runners
Transmission: Tremec T56
Axle/Gears: 12-Bolt 3.73
The dual-cat exhaust is a lot better than the single-cat exhaust. One area you can improve upon tho is where the two pipes join together after the cats.
I made mine look like this:
http://24.1.139.249/images/101400/DCP_0018.JPG
------------------
1991 Camaro Z28
5.7L 5-Speed (originally 305)
317 RWHP, 418 RWTQ
13.23 @ 107.62 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Member: SoCal F-Bodies
-=ICON Motorsports=-
I made mine look like this:
http://24.1.139.249/images/101400/DCP_0018.JPG
------------------
1991 Camaro Z28
5.7L 5-Speed (originally 305)
317 RWHP, 418 RWTQ
13.23 @ 107.62 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Member: SoCal F-Bodies
-=ICON Motorsports=-
you also might wanna get some high flow cats. or gut em
------------------
- David
88' GTA 5.7L TPI MODS---> air foil, K&N, Shift Kit, 180* therm, TB bypass, Gutted CAT, Flowmaster 80 Series
------------------
- David
88' GTA 5.7L TPI MODS---> air foil, K&N, Shift Kit, 180* therm, TB bypass, Gutted CAT, Flowmaster 80 Series
Thread
Thread Starter
Forum
Replies
Last Post








