Clogged front cats?
Team Owner
Joined: Aug 2000
Posts: 40,156
Likes: 45
From: San Pedro CA
tap them with a rubber hammer...
then beat the hell out of them and gut them. They are nothing but exhaust restrictors.
Sure, they help at cold start, but within 3 miles, they are done. Just make sure the main cat is working fine and you will be ok.
then beat the hell out of them and gut them. They are nothing but exhaust restrictors.
Sure, they help at cold start, but within 3 miles, they are done. Just make sure the main cat is working fine and you will be ok.
Team Owner
Joined: Sep 2001
Posts: 62,127
Likes: 1,727
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
Dont even worry about them being clogged, gut them anyway. Preferably you would cut them out and put a pipe in.
Le Mans Master
Joined: Jul 2002
Posts: 5,818
Likes: 2
From: Alive and well in Burlington NC
Originally Posted by vader86
Dont even worry about them being clogged, gut them anyway. Preferably you would cut them out and put a pipe in.
Eliminate the pre-cats and install a high flow, three stage main.
Team Owner
Joined: Jan 2003
Posts: 20,292
Likes: 239
From: Summerland B.C. Canada
Originally Posted by bogus
tap them with a rubber hammer...
then beat the hell out of them and gut them. They are nothing but exhaust restrictors.
Sure, they help at cold start, but within 3 miles, they are done. Just make sure the main cat is working fine and you will be ok.
then beat the hell out of them and gut them. They are nothing but exhaust restrictors.
Sure, they help at cold start, but within 3 miles, they are done. Just make sure the main cat is working fine and you will be ok.
Racer
Joined: Mar 2001
Posts: 312
Likes: 0
From: Mesa Az
Pre cats
I cut my y-pipe right behind the cats and used a hammer and chisel to try and gut them. (Wear a mask, that dust is terrible) Borrowed a friends pneumatic chisel and had them both gutted in minutes. Then had the pipes rewelded. Sounds a little deeper now and still passed Az emissions.
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Team Owner
Joined: Aug 2000
Posts: 40,156
Likes: 45
From: San Pedro CA
Originally Posted by AGENT 86
I never ever thought i would see the day when you say "beat the hell out of them and gut them"