Gutting Pre Cats
Thread Starter
Pro
Joined: Jul 2000
Posts: 576
Likes: 0
From: highland, maryland, usa
Gutting Pre Cats
I have my intermediate pipes off at the moment and was thinking of gutting the pre cats why I have access to them. Who has done this and what is the best way to gut them. Any precautions? I am looking for better sound , dont think there is much HP gain. I have the A&A exhaust mod no x pipe. Thanks Jeff
Safety Car
Joined: Dec 2000
Posts: 3,950
Likes: 32
From: belleville n.j.
Re: Gutting Pre Cats (ajrls)
yes there is a gain. if i were in your shoes and had the time to weld get some long tube headers. if not, get some B&B shorty headers next day aired to you and bolt them right in. precats restrict you badly. get rid of them in whatever means-you will feel it more responsive
Melting Slicks
Joined: Jul 2001
Posts: 3,284
Likes: 3
From: Southwest Florida
Re: Gutting Pre Cats (robsvette)
All you should need to do is get a thin (1/4 to 1/2 inch) pole and drive it through with a hammer, dumping the debris as you go. You may not be happy with the sound if this is all you do though! I've heard of people inserting a straight pipe through there to cut back on turbulence. Might not be a bad idea because I hated the sound of hollow cats. If you just hollow it, the walls are so thin and the chamber makes so much resonance, it sounds too raspy and the sound is horrible. Just my opinion.
I think if it's better sound you want, I'd concentrate on the mufflers. Cars with no cats stink to high heaven and the "noise" they make is not for everyone.
Mike
I think if it's better sound you want, I'd concentrate on the mufflers. Cars with no cats stink to high heaven and the "noise" they make is not for everyone.
Mike
Drifting
Joined: Jun 2000
Posts: 1,338
Likes: 0
From: Fontana CA
Re: Gutting Pre Cats (capt1mike)
Here is another solution that may work and may keep you legal. The 2002 Z06 is supposed to come with a new single cat that does the work of both cats while causing no more restriction that the larger 2nd cats. According to an article I read somewhere (c5 registry maybe?) they were responsible for a significant portion of the power increase from '01 to '02. You might want to consider replacing all four cats with two of the ‘02s.
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Racer
Joined: Jul 2000
Posts: 440
Likes: 0
From: Naples, Florida
Re: Gutting Pre Cats (SoCal C5)
Thanks (SoCal) OK how about the 2001 cars in ca.? Thay don't put 3 cats on do thay? or maybe bigger ones? Capt1Mike
yea capt1mike, 2001 and I believe at least some 2000 have 2 regular cats and 2 pre cats
those with CA emisions have precats
those with CA emisions have precats
yea capt1mike, 2001 and I believe at least some 2000 have 2 regular cats and 2 pre cats
those with CA emisions have precats
those with CA emisions have precats
yea capt1mike, 2001 and I believe at least some 2000 have 2 regular cats and 2 pre cats
those with CA emisions have precats
those with CA emisions have precats
yea capt1mike, 2001 and I believe at least some 2000 have 2 regular cats and 2 pre cats
those with CA emisions have precats
those with CA emisions have precats
