Replacing Cats

Reply Subscribe

Thread Tools

Search this Thread

04-25-2007, 01:01 AM

Brian_Zinchuk

4th Gear Member

Thread Starter

Join Date: Apr 2007

Location: Virginia

Posts: 1,118

Replacing Cats

Has anyone heard of performance cats that are legal? I was at a shop today getting my ford racing headers installed and the guy asked me if i had the performance ford racing cats too? I really dont know to much about this stuff so give me some help. Thanks

04-25-2007, 01:51 AM

hawgman

I ♥ Acer

Join Date: Feb 2005

Location: Texas

Posts: 3,225

RE: Replacing Cats

By letter of the law no aftermarket cat is legal.
Emissions laws clearly state that altering the exhaust in any way, including replacing the cats with aftermarket cats or changing their position in the exhaust system is a violation.

04-26-2007, 11:10 AM

MustangEsq

2nd Gear Member

Join Date: Nov 2006

Location: Long Island

Posts: 191

RE: Replacing Cats

Quote:

ORIGINAL: hawgman

By letter of the law no aftermarket cat is legal.
Emissions laws clearly state that altering the exhaust in any way, including replacing the cats with aftermarket cats or changing their position in the exhaust system is a violation.

You are allowed to change cats if they are in some way damaged, ie you were in an accident. If the cats stop functioning properly, you can chenge them as well. You can put hi-flows on then....but save the old cats just in case.

You could take a pipe wrench and go to work on them, but I dont think that is what the EPA had in mind!