Catalytic Converter question
Thread Starter
Racer
Joined: Mar 2007
Posts: 337
Likes: 0
From: yorktown virginia
Catalytic Converter question
hey guys.. im trying to peice together an exhaust system and have a few questions... I have corsa indy cat back and I want kooks headers.. im running a stock ls1... so should I look for 1-3/4 headers or 1-7/8 headers? also the intermediate pipes are soo dang expensive i was thinking about just getting separate parts ( X pipe and cats).. Ive seen high flow 3" cats by magnaflow and others all over ebay for 50-100 bux each.. and Xpipes on here for like 200... question is can i use kooks headers to generic 3 " cats and xpipe to cat back exhaust? thanks..
Instructor
Joined: Aug 2006
Posts: 205
Likes: 0
From: TEXAS
if you dont have to worry about emissions i would go catless or have a pretty straight through catback. my car blew the guts out of the cats and ended up clogging up my b&b route 66 catback. i have the kooks 1 7/8" headers with the catted x pipe. i believe the cats are magnaflows.
Race Director
Joined: Mar 2007
Posts: 18,308
Likes: 21
From: Marlton. Increasing performance one speeding ticket at a time! NJ
Most research has told me that for a stock size LS1/LS6, go with 1 3/4". Only if you bump the cubes up do you need (or really want) 1 7/8".
Using larger pipes on a 346ci can actually hurt the scavanging effect of the headers.
Using larger pipes on a 346ci can actually hurt the scavanging effect of the headers.
Le Mans Master
Joined: May 2006
Posts: 5,987
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From: DuBois PA
St. Jude Donor '11-'12-'13-'14-'15
Burning Brakes
Joined: Oct 2004
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From: EXTON PA
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Le Mans Master
Joined: May 2006
Posts: 5,987
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From: DuBois PA
St. Jude Donor '11-'12-'13-'14-'15
We don't have any here yet, but with those I should pass with flying colors, I have the AIR and rear O2 sensors still on and functioning and my tune is dead on. I decided to keep it legal for resale...
Tim
Tim
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