When did they start using pre cats?
Supporting Tuner
Joined: Sep 2004
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From: ================== Houston, Texas www.englandgreen.com ================== Necessary Evil™ __________
CI 6-7-8-9-10 Veteran
St. Jude Donor '05-'06-'07-'08-'09-'10-'11-'12-'13-'14
2001 was the first year, I believe.
Le Mans Master
Joined: May 2003
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From: Hells Sister City Phoenix AZ
St. Jude Donor '03
Originally Posted by Dave1998
What is it ?
Le Mans Master
Joined: Dec 2001
Posts: 5,761
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From: Irvine CA
I think California Vettes had them originally. I have a 2000 FRC and it has precats in addition to the main cats. I think in late 2001, they put them in all Vettes to make them 50 state legal.
Team Owner
Joined: Apr 2001
Posts: 54,204
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From: S.W. Ohio. . . . . . NRA Life Member
Originally Posted by c5chris
I think California Vettes had them originally. I have a 2000 FRC and it has precats in addition to the main cats. I think in late 2001, they put them in all Vettes to make them 50 state legal.
But like others have stated, starting 2001... all C5's have precats, except for the Z06.
I have some pics here:
http://mikemercury.home.att.net/precats.htm
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Race Director
Joined: Jul 2005
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From: The Beautiful Greater Bay Area California
Originally Posted by eddie44
They're smaller cats that are on the exhaust pipe up just behind the exhaust manifold. My 02 has them and it was built in July 01.
Le Mans Master
Joined: Sep 2003
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From: Farmington CT
Cruise-In VII Veteran
Originally Posted by beden1
They are resonators aren't they?
97-99 and the 02-04 Z's have no pre cats
00-04 and 01 Z have pre cats, CA models may be different
i have a pile of 99/00/01/02/03 h-pipes and half of an 04(x-pipe install)
also interesting to note the early 97-00 h-pipes won't work w/ the later version, the later cast iron manifolds(commonly referred to z06 manifolds, but standard upgrade on ALL c5's in 01) have a different location for the front connection
also the 99(maybe other years) are double walled before the cat, uncle cut the cats off for use on a '55 Nomad project
Thread Starter
Safety Car
Joined: Apr 2003
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From: Stuck in Paradise
Those of you who have removed the pre cats and installed headers, what happened when you went to emission testing?
I want to put on headers and right now Indiana or Florida do not have emission testing so I'm OK. I just wonder in case they start.
I want to put on headers and right now Indiana or Florida do not have emission testing so I'm OK. I just wonder in case they start.