Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - Cat size suggestion?
View Single Post
  #4 (permalink)  
Old 02-09-2013, 02:10 PM
TMF Lindbeck TMF Lindbeck is offline
Registered User
 
Last photo:
Join Date: Feb 2011
Location: hawaii
Posts: 96
Wiki Edits: 0

Thanks: 2
Thanked 1 Time in 1 Post
I would think 3" in from the collectors with 2 1/2 outs to keep the exhaust velocity up. The exhaust will cool and slow down through the cats and the 2 1/2 will help with the scavaging. Then again cats and hi performance don't really go hand in hand. IIRC h pipe for low end tq and the x pipe is best suited for hi rpm hp. Additionally the H or X pipe ideally would be as close as possible to the headers.
Reply With Quote