Installing headers, 2.5" or 3" catback?
Thread Starter
Advanced
Joined: Sep 2008
Posts: 77
Likes: 1
From: Park Ridge-Chicago Illinois
Installing headers, 2.5" or 3" catback?
2000 LS1-346 w V3Si, 3.4 pulley and a cam making 547 rwhp w stock manifolds and intermediate pipe into a 15yr old corsa touring cat back.
Plan is for some Kooks 1 7/8" with their 3" green catted x pipe shooting for 600rwhp.
Question is: 2.5" or 3" catback? I really like this old corsa catback I'm currently running which is 2.5". Am I leaving a lot on the table by staying w 2.5" or should I go with a 3" catback and have 3" all the way?
Plan is for some Kooks 1 7/8" with their 3" green catted x pipe shooting for 600rwhp.
Question is: 2.5" or 3" catback? I really like this old corsa catback I'm currently running which is 2.5". Am I leaving a lot on the table by staying w 2.5" or should I go with a 3" catback and have 3" all the way?
Team Owner
Joined: Jan 2007
Posts: 29,063
Likes: 1,839
From: cookeville tennessee
2000 LS1-346 w V3Si, 3.4 pulley and a cam making 547 rwhp w stock manifolds and intermediate pipe into a 15yr old corsa touring cat back.
Plan is for some Kooks 1 7/8" with their 3" green catted x pipe shooting for 600rwhp.
Question is: 2.5" or 3" catback? I really like this old corsa catback I'm currently running which is 2.5". Am I leaving a lot on the table by staying w 2.5" or should I go with a 3" catback and have 3" all the way?
Plan is for some Kooks 1 7/8" with their 3" green catted x pipe shooting for 600rwhp.
Question is: 2.5" or 3" catback? I really like this old corsa catback I'm currently running which is 2.5". Am I leaving a lot on the table by staying w 2.5" or should I go with a 3" catback and have 3" all the way?
But if you can sell your 2.5 for a ok price then buy the 3 inch I would go for that.
Thread Starter
Advanced
Joined: Sep 2008
Posts: 77
Likes: 1
From: Park Ridge-Chicago Illinois
maybe I should have posted in tech. I always figure cuz I have a blower it belongs here
I talked with a Kooks tech and he basically felt the dif in hp would be minimal. Guessing 8-10hp tops. I'll keep my 2.5" and save the dough.
I talked with a Kooks tech and he basically felt the dif in hp would be minimal. Guessing 8-10hp tops. I'll keep my 2.5" and save the dough.
Advanced
Joined: May 2014
Posts: 89
Likes: 0
