Replace stock cats?
Thread Starter
Safety Car
Joined: Sep 2004
Posts: 4,762
Likes: 0
Replace stock cats?
Has anyone replaced just the stock cats? I don't want to replace the whole section since I'm cheap. Is it a worthwhile mod and how difficult is it? Also, how much can I expect to spend if I do it myself. I'm planning on removing the precats and opening up the holes in the H pipe, thought I might do this as well. Any replies would be greatly appreciated. Thanks.
Safety Car
Joined: Jul 2002
Posts: 3,874
Likes: 0
From: Fishing Somewhere Cold
St. Jude Donor '11-'12-'13, '15
YOu can probably get 5-7 hp by losing the cats and replacing with Random tech hi flow cats....but they cost like over $500.00 a set...maybe you want to do some more work with them to make it count, like Longtube headers!!! 
Thread Starter
Safety Car
Joined: Sep 2004
Posts: 4,762
Likes: 0
I didn't realize the cost was that high. One of the vendors sells the whole section (with X-pipe) for about 700. I guess I may be better off going that route. Gonna have to start saving my pennies. Thanks for the input.
Race Director
Joined: Sep 2001
Posts: 13,292
Likes: 0
From: Hockessin Delaware
Originally Posted by MJD
I didn't realize the cost was that high. One of the vendors sells the whole section (with X-pipe) for about 700. I guess I may be better off going that route. Gonna have to start saving my pennies. Thanks for the input.
Team Owner
Joined: Jul 2003
Posts: 20,474
Likes: 2
From: Detroit
What are your mods? Hi-flow cats aren't going to give you very much at all in terms of performance. Certainly not enough to justify $500. My 'hi-flow' cats were destroyed in under 2000 miles.. ProChargers and cats apparently don't get along 
.
Mark
.Mark
Thread Starter
Safety Car
Joined: Sep 2004
Posts: 4,762
Likes: 0
Right now I don't have any mods. I just got my car about a month ago and I'm trying to get an idea of what I want to do. I don't have a spare 1500 for a full header system, just a couple hundred here and there to play with right now.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Drifting
Joined: Mar 2001
Posts: 1,471
Likes: 1
From: Pensacola FL
I'd start with an intake first, than do the exahust. I'd wait & do headers and cats/Xpipe at the same time. I found a great deal on used headers along with high flow cats & Xpipe. Take your time & plan your mods in advance. That way you will only spend the money once and not end up having to re-do them the right way the second time around. Ask me how I know that 
Melting Slicks
Joined: Jun 2001
Posts: 2,743
Likes: 3
From: Davie Florida
Originally Posted by 99 The Hard Way
I'd start with an intake first, than do the exahust. I'd wait & do headers and cats/Xpipe at the same time. I found a great deal on used headers along with high flow cats & Xpipe. Take your time & plan your mods in advance. That way you will only spend the money once and not end up having to re-do them the right way the second time around. Ask me how I know that
Keep an eye on the C5 Parts For sale Forum. You might be able to pickup headers and Hi Flow cats at a very reasonable price.
