Post by
1991S13 »
https://forums.nicoclub.com/1991s13-u22320.html
Mon Jun 20, 2005 4:28 pm
3" got someone a 16hp gain, so that is a good choice as long as you don't try to sneak around quiet neighborhoods at night time.
A lot have 2.25", a lot have 2.5", a lot have 3"...after some research you will make your mind up.
DC Sports header, high flow cat, 2.25-3" tubing, straight through muffler...buying a catback will be more expensive than buying the pipe and getting it bent then putting a muffler on it, though.