Should I gut the pre-cats?
Thread Starter
Melting Slicks
Joined: Feb 2002
Posts: 2,450
Likes: 0
From: Kansas City Missouri
Should I gut the pre-cats?
I am going to get a new exhaust (Z06), and just want a little meaner sound. Nothing too loud, or raspy. I have researched, and some mentioned resonance? I do not want to remove the main cats, for smell, emissions, low end torque reasons. Will I gain any Hp? Will this sound good with the Z06 exhaust? I want a throaty mean sound. Thanks in advance. :cheers:
Safety Car
Joined: Jul 2001
Posts: 4,261
Likes: 2
From: Fort Wayne,Indiana
Re: Should I gut the pre-cats? (rrobert22)
I cut mine out and welded a straight pipe in its place.I read somewhere that GM said it was worth 5 hp.My sound did get a little throatier.
[Modified by GaryZ06, 4:27 PM 8/30/2002]
[Modified by GaryZ06, 4:27 PM 8/30/2002]
Racer
Joined: Aug 2000
Posts: 296
Likes: 3
From: Enterprise AL
Cruise-In II Veteran
Re: Should I gut the pre-cats? (GaryZ06)
I gutted mine a month or so ago - I believe this is the best bang for the buck mod for a '01 or '02. I did notice more power in the upper RPM range (>4500) and the exhaust note is more throaty.
Team Owner
Joined: Apr 2001
Posts: 54,204
Likes: 180
From: S.W. Ohio. . . . . . NRA Life Member
Re: Should I gut the pre-cats? (GaryZ06)
Gary, I wanted to do the same as you did; but feared our states AlGore smog check ****'s catching it during the visual check.
I have done just that; Z06 titanuims with gutted precats. It sounds a lot meaner from outside the car; but is still bearable on the inside.
Like someone said earlier; its a free mod!
my how-to on this procedure:
mikemercury.home.att.net/precats.htm
I have done just that; Z06 titanuims with gutted precats. It sounds a lot meaner from outside the car; but is still bearable on the inside.
Like someone said earlier; its a free mod!
my how-to on this procedure:
mikemercury.home.att.net/precats.htm
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Thread Starter
Melting Slicks
Joined: Feb 2002
Posts: 2,450
Likes: 0
From: Kansas City Missouri
Re: Should I gut the pre-cats? (rrobert22)
Too late to go back now, its done :smash: It does sound a little deeper, not much though. Ill have to wait and see what the Z06 sounds like. :cheers:
Thread Starter
Melting Slicks
Joined: Feb 2002
Posts: 2,450
Likes: 0
From: Kansas City Missouri
Re: Should I gut the pre-cats? (DCBStingray)
Not sure about the richer/leaner thing. I just left the stock pipes in place and cleaned them out. :D It is a little louder, and meaner, Ill post when I get the Z06ers on there.
Did this make your car start running richer or leaner, also where did you get those exhaust pipes?
