Pre Cat elimination
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Joined: Oct 2002
Posts: 73
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From: Ft Myers FL
Pre Cat elimination
Hi all, just wondering what kind of effort it takes to make the pre-cat material "disappear" , Any advice or suggestions welcomed.. :jester
UPDATE....
Its done !!! This was not as bad as I thought...PITA to do it alone though :crazy:
Hopefully tomarrow I'll button it up :D
Thanks for all the advice and encourgement :thumbs:
[Modified by Vette#4, 6:38 AM 11/28/2002]
UPDATE....
Its done !!! This was not as bad as I thought...PITA to do it alone though :crazy:
Hopefully tomarrow I'll button it up :D
Thanks for all the advice and encourgement :thumbs:
[Modified by Vette#4, 6:38 AM 11/28/2002]
Burning Brakes
Joined: Jun 2000
Posts: 1,122
Likes: 0
From: Annapolis, MD USA
Re: Pre Cat elimination (Vette#4)
They are usually removed by cutting off and discarding the "downpipe" section of the OEM exhaust system. If you keep the original cats, this does not seem to affect emissions results.
Racer
Joined: Aug 2000
Posts: 296
Likes: 3
From: Enterprise AL
Cruise-In II Veteran
Re: Pre Cat elimination (Vette#4)
The easiest method of pre-cat elimination is to "gut" them. This means to remove the catalest material, which is actually very easy. The hardest part of the whole job is removing and then re-installing the exhaust system, and that's not too hard either. To remove the materal, I used an extra long 3/8 masonite drill bit and driled several holes in the "brick". Then used the end of a pry bar to break it up. And I finished with a rotary paint stripping attachment to insure all the material was cleaned from the interor of the converter. I fell this is easily the "best bang for the buck" mod for '01 and newer Vettes. I picked up a nice exhaust note and a noticable increase in upper RPM power.
Do it, its easy, you just need some jackstands and a little elbow grease. Youll pick up a nice exhaust not too. :cheers:
Team Owner
Joined: Apr 2001
Posts: 54,204
Likes: 180
From: S.W. Ohio. . . . . . NRA Life Member
Re: Pre Cat elimination (GaryZ06)
if your state does visual inspections (along with the tailpipe test) you may fail the visual if the pre-cats are cut out.
vIf so; then remoping the catalyst material and leaving the pup-cats hollow may be the only way to go.
gutting the C5 pre-cats
[Modified by Mike Mercury, 11:14 PM 11/27/2002]
vIf so; then remoping the catalyst material and leaving the pup-cats hollow may be the only way to go.
gutting the C5 pre-cats
[Modified by Mike Mercury, 11:14 PM 11/27/2002]
