Headers or Catback first
Supreme Member
Joined: Jan 2001
Posts: 7,164
Likes: 1
From: Someone owes me 10,000 posts
Car: 99 Formula
Engine: LS1
Transmission: T56
Axle/Gears: 342
On the stock motor, I see the manifolds and y-pipe more of a restriction than the stock cat-back, so I would go with headers.
Thread
Thread Starter
Forum
Replies
Last Post
redformula88
Engine/Drivetrain/Suspension Parts for Sale
2
Oct 14, 2015 06:08 PM
Chad Speier
Engine/Drivetrain/Suspension Parts for Sale
3
Sep 24, 2015 12:32 PM
