removing precats

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Sep 28, 2003 | 06:40 PM

lar66BB

Thread Starter

Burning Brakes

Joined: Nov 2002

Posts: 1,018

Likes: 52

From: Deltona Fl.

removing precats

removing the precats on a 2000, are there any issues. Thanks
:steering:

Sep 29, 2003 | 01:53 PM

davidfarmer

Race Director

Joined: Sep 1999

Posts: 12,422

Likes: 905

From: CONCORD NC

Re: removing precats (lar66BB)

ideally you would simply but a 2-cat h-pipe from someone, OR get the front half from someone who has installed headers. Because your car has the multi-layer insulated pipes, welding in "normal" exhast tubing can be tricky.

Sep 29, 2003 | 02:55 PM

Heretic

Pro

Joined: Jun 2003

Posts: 702

Likes: 0

From: Castle Rock Co

Re: removing precats (davidfarmer)

Could you elaborate on the insulated pipe and tricky parts please?

I have a 2001 h-pipe that I want to eliminate the precats on, and possibly install car sound cats.

Thanks for any info.

Sep 29, 2003 | 04:09 PM

Racer1x

Pro

Joined: Jul 2002

Posts: 627

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From: Campbell Ca

Re: removing precats (Heretic)

Don't cut them out, just take off the whole h-pipe and punch out all the catalyst in the pre-cats.Alot of guys have done this with no Ill effects, it will flow better and sound better also.This way is cheaper than finding someone with an h-pipe that has no pre-cats and having to replace it.

Sep 29, 2003 | 04:35 PM

Heretic

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Joined: Jun 2003

Posts: 702

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From: Castle Rock Co

Re: removing precats (Racer1x)

I thought about that, but I considered the fact that the empty shell of the cat would introduce a bunch of turbulence in the exhaust stream.

Or am I thinking too much into this?

Sep 30, 2003 | 04:34 AM

Oskee

Burning Brakes

Joined: Jun 2002

Posts: 768

Likes: 129

From: Vacaville Ca

Re: removing precats (lar66BB)

I gutted my pre-cats on my Y2k C5 about 2years ago. The first thing I did notice was the exhaust note was just a tad louder . Looking into the pre-cats
I was amazed that any exhaust could even pass thru because it looked very restrictive. If you do gut them becareful not to let the cat-residue fall into the main cats because they can plug them up. :smash: