ordered new exhaust.

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Jan 6, 2015 | 11:11 AM

#11

2k232

Thread Starter

2nd Gear Member

Joined: May 2010

Posts: 344

From: South Carolina- Rock Hill

Quote:

Originally Posted by clowe1965

Also some feedback from Prodyno, they ran holden's 3.7 without cats and said it would have gotten more with them. Might consider some high flows to keep the back pressure up.

Lethals performance website....http://www.lethalperformance.com/let...ad-h-pipe.html

Quote:

Lethal Performance 3.7L V6 2.5" Offroad H-Pipe

-Direct Replacement for your stock X-pipe
- 14 to 16rwhp Increase
-Mandrel Bent 2.5" Aluminized Steel
-Includes Hardware for installation
-Fits Auto and Manual Cars
-Removes Stock Cats OFFROAD USE ONLY
-Tune Required

Last edited by 2k232; Jan 6, 2015 at 11:14 AM.