Removing Pre Cats??
Thread Starter
Racer
Joined: Feb 2005
Posts: 270
Likes: 8
From: O'Fallon Illinois
Removing Pre Cats??
I'm about to drop my exhaust system to install the Elite Emgineering tunnel reinforcement. I was thinking that while I had it down, I might strip out the stuffings to the pre cats.
What effect does this have on performance???
If it picks up a HP or two, OK. But I don't want to loose one foot pound of low-end torque.
Any one done this?
What effect does this have on performance???
If it picks up a HP or two, OK. But I don't want to loose one foot pound of low-end torque.
Any one done this?
Burning Brakes
Joined: Feb 2004
Posts: 1,024
Likes: 108
From: Ocala, Fl. State of Confusion
I had my mechanic gut mine. Don't know the HP diff, but one would think that it helped in the breathing department. There was a thread on this site that stated 4 RWHP gain, but I don't know where the figure came from.
Team Owner
Joined: Apr 2001
Posts: 54,204
Likes: 180
From: S.W. Ohio. . . . . . NRA Life Member
I think it deepened my exhaust note a little bit.
read here:
http://mikemercury.home.att.net/precats.htm
read here:
http://mikemercury.home.att.net/precats.htm
Safety Car
Joined: May 2000
Posts: 4,818
Likes: 347
From: Albuquerque NM
If you're gonna do it, do it the right way. Have the cats cut out and replaced with smooth pipe. While gutted cats improve flow over stock, straight pipe is much better. Gutted cats (my friend's Vette) gained 6 rwhp, straight pipe (my Vette) gained 15 rwhp over stock cats. 
Off road only, of course.
Off road only, of course.
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Burning Brakes
Joined: Oct 2003
Posts: 1,106
Likes: 1
From: Foresters Falls(near Ottawa) Ont
Originally Posted by Mike Mercury
I think it deepened my exhaust note a little bit.
read here:
http://mikemercury.home.att.net/precats.htm
read here:
http://mikemercury.home.att.net/precats.htm
My 98 without pre-cats was noticeably louder than my 01 is with the pre-cats.
This is with Borla Stingers. If nothing else, the drone isn't as bad on the 01.
RonJ ...
