High Flow Cats???
Thread Starter
Le Mans Master
Joined: Nov 2004
Posts: 7,242
Likes: 8
High Flow Cats???
In my exhaustive search for the perfect set up, I've come across a forum member who plans on using Route 66s with RT cats and no headers. Seems to add a little hp and increase the volume with little negatives to it.
What is the word out there?
1. Do the RT's really live up to their claim of 8 hp? For $650, seems reasonable but certainly not a bargain.
2. Will this wake up the sound a little? I love the Route 66s, but I feel they could be a little louder. Will this be likely to make them 'just right'?
3. Are they worth it, or would it make much more sense to go with something like Kooks with high flow cats for not a hell of a lot more money? This may be too loud for me, from what I'm reading.
4. Who has done this - anyone swapped out for high flow cats with no headers yet?
What is the word out there?
1. Do the RT's really live up to their claim of 8 hp? For $650, seems reasonable but certainly not a bargain.
2. Will this wake up the sound a little? I love the Route 66s, but I feel they could be a little louder. Will this be likely to make them 'just right'?
3. Are they worth it, or would it make much more sense to go with something like Kooks with high flow cats for not a hell of a lot more money? This may be too loud for me, from what I'm reading.
4. Who has done this - anyone swapped out for high flow cats with no headers yet?
Drifting
Joined: Nov 2004
Posts: 1,923
Likes: 62
From: California
I got mines.
Originally Posted by cmb13
In my exhaustive search for the perfect set up, I've come across a forum member who plans on using Route 66s with RT cats and no headers. Seems to add a little hp and increase the volume with little negatives to it.
What is the word out there?
1. Do the RT's really live up to their claim of 8 hp? For $650, seems reasonable but certainly not a bargain.
2. Will this wake up the sound a little? I love the Route 66s, but I feel they could be a little louder. Will this be likely to make them 'just right'?
3. Are they worth it, or would it make much more sense to go with something like Kooks with high flow cats for not a hell of a lot more money? This may be too loud for me, from what I'm reading.
4. Who has done this - anyone swapped out for high flow cats with no headers yet?
What is the word out there?
1. Do the RT's really live up to their claim of 8 hp? For $650, seems reasonable but certainly not a bargain.
2. Will this wake up the sound a little? I love the Route 66s, but I feel they could be a little louder. Will this be likely to make them 'just right'?
3. Are they worth it, or would it make much more sense to go with something like Kooks with high flow cats for not a hell of a lot more money? This may be too loud for me, from what I'm reading.
4. Who has done this - anyone swapped out for high flow cats with no headers yet?
I got Corsa Sport and RT High flow cats and NO headers. First I got the Corsa Sport and it made a little bit of noise. Then I got the RT high flow cats and it made the car Loud but not too loud, its "Just Right" for me. It make it louder all the way from idle to redline. I especially love it when it gets above 5K RPM, man it really screams; could not have done it without the RT cats. I can not prove the 8HP that RT claimed but I personally can feel a bit more power, more power I'd say that I got from the Corsa. Bottom line is, I love it.
Last edited by DJackman; Sep 14, 2005 at 03:22 AM.
Safety Car
Joined: Dec 2004
Posts: 3,565
Likes: 5
From: stafford country, va. Avatar: Me on turn 3 @ Bristol (The World's Fastest Half-Mile)
I also did this mod. I had my cats replaced with Metal'Cats hi-flow cats. They are supposed to flow something like 534cfm.
yes, they woke up my B&B Bullets some more. In fact, they made so much noise I was beginning to regret it. Two days later the 'bad' noise level has mellowed and now they sound quite good in the cabin, I hear more of the thump thump thump instead of just mmmmmmmmmmmm... .
It does 'feel' as if they have made a difference but I haven't made it over to the dyno, yet.
Prior to the mod. my gas mileage was getting pretty bad, I was averaging around 18-19, now I'm averaging 22-23.
If they don't work out I'm thinking I can always grab a set of headers and reuse the cats.
yes, they woke up my B&B Bullets some more. In fact, they made so much noise I was beginning to regret it. Two days later the 'bad' noise level has mellowed and now they sound quite good in the cabin, I hear more of the thump thump thump instead of just mmmmmmmmmmmm... .
It does 'feel' as if they have made a difference but I haven't made it over to the dyno, yet.
Prior to the mod. my gas mileage was getting pretty bad, I was averaging around 18-19, now I'm averaging 22-23.
If they don't work out I'm thinking I can always grab a set of headers and reuse the cats.
Last edited by Zig; Sep 14, 2005 at 07:54 AM.
Thread Starter
Le Mans Master
Joined: Nov 2004
Posts: 7,242
Likes: 8
Originally Posted by Zig
I also did this mod. I had my cats replaced with Metal'Cats hi-flow cats. They are supposed to flow something like 534cfm.
Thread Starter
Le Mans Master
Joined: Nov 2004
Posts: 7,242
Likes: 8
Originally Posted by TommyV
Looks like I sparked your interest.
Originally Posted by Pingky71
I got Corsa Sport and RT High flow cats and NO headers. First I got the Corsa Sport and it made a little bit of noise. Then I got the RT high flow cats and it made the car Loud but not too loud, its "Just Right" for me. It make it louder all the way from idle to redline. I especially love it when it gets above 5K RPM, man it really screams; could not have done it without the RT cats. I can not prove the 8HP that RT claimed but I personally can feel a bit more power, more power I'd say that I got from the Corsa. Bottom line is, I love it.
Anyone else? Anyone have them with the Route 66s?
Safety Car
Joined: Dec 2004
Posts: 3,565
Likes: 5
From: stafford country, va. Avatar: Me on turn 3 @ Bristol (The World's Fastest Half-Mile)
Originally Posted by cmb13
What brand? How much do these things usually run? Seems like $650 -700 for the RT's on average.
(http://www.jcwhitney.com/autoparts/V...012679/c-10114)
I was unable to find them from any of the forum vendors.
Press Release:
http://www.arvinmeritor.com/media_ro...0000019B2A0000
Last edited by Zig; Sep 14, 2005 at 11:19 AM.
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: Nov 2002
Posts: 1,651
Likes: 125
From: laguna niguel ca
Do it all at once, get a system that works
Save your money. $1600 buys you Kooks 1 3/4 headers there 3 inch high flow cats and x-pipe (one piece) 3 inches all the way back to the pipes going over the rear end. Factory fit excellent quality. No codes. Not to mention the 25RWHP you'll pick-up. I have this system. You won't be sorry. Making over 400RWHP with a cam and this system
Andy G.
Andy G.
Drifting
Joined: Nov 2004
Posts: 1,923
Likes: 62
From: California
Pricing
Originally Posted by cmb13
What brand? How much do these things usually run? Seems like $650 -700 for the RT's on average.
Safety Car
Joined: Dec 2004
Posts: 3,565
Likes: 5
From: stafford country, va. Avatar: Me on turn 3 @ Bristol (The World's Fastest Half-Mile)
Originally Posted by Pingky71
I paid the RT cats (both pass. and driver side) for around 6Bills. The best thing is that the RT cats are a True Bolt-On system, only has 10 bolts to undo them including the 02 sensors. The whole job only took 1 hr and you dont even have to remove the exhaust manifold. My local muffler shop charged me 80 bucks for the job.
these were my first choice but every place I checked had a 2 week waiting period. the true bolt up would have been nice.I ended up waiting around 5 hours while they built the pipes, etc. to put on the ones (MetalCat) I bought.
How do you like the RTs, any noticeable power difference ? Do you by any chance have any dyno numbers of before and after ?
I'm trying to find the flow numbers on the stock exhaust manifolds but have only been able to find that they flow 4% better than the previous ones. Anyone got the flow numbers of the stock manifolds ?
I found an excellent article on exhaust systems over on SuperChevy's website. Exhaust Science Demystified (http://superchevy.com/technical/engi...exh/index.html). Now all I need to do is see if I can find the flow numbers, etc and I should be able to put together a pretty good exhaust.
Last edited by Zig; Sep 15, 2005 at 06:38 AM.
Pro
Joined: Nov 2003
Posts: 570
Likes: 0
From: Olathe Kansas
Do any of these company's make a straight pipe (no cats) the performance would be better than hi-flow cats and the price should be about half.
I personally don't want to change the sound of my exhaust for daily driving, but for the track, these seem so easy to change out I could throw them on when I am there, and take them off when I am done.
I personally don't want to change the sound of my exhaust for daily driving, but for the track, these seem so easy to change out I could throw them on when I am there, and take them off when I am done.
Drifting
Joined: Feb 2000
Posts: 1,591
Likes: 53
From: Central MN
Rather than spending $600. on high flow cats, couldn't you just "gut out" the stock cats? I have a friend who put on a set of long tubes and he told me that he just "punched out" cats. He did, however, have to do something with the oxygen sensors.
Pro
Joined: Nov 2003
Posts: 570
Likes: 0
From: Olathe Kansas
Originally Posted by 05-C6
Rather than spending $600. on high flow cats, couldn't you just "gut out" the stock cats? I have a friend who put on a set of long tubes and he told me that he just "punched out" cats. He did, however, have to do something with the oxygen sensors.
Just my $0.02
Thread Starter
Le Mans Master
Joined: Nov 2004
Posts: 7,242
Likes: 8
Originally Posted by Zig
I found an excellent article on exhaust systems over on SuperChevy's website. Exhaust Science Demystified (http://superchevy.com/technical/engi...exh/index.html). Now all I need to do is see if I can find the flow numbers, etc and I should be able to put together a pretty good exhaust.
Drifting
Joined: Nov 2004
Posts: 1,923
Likes: 62
From: California
High flow Cats
Originally Posted by Nickedimus
pingky71,
do you have a cat back system or stock, and in your opinion did the RT's make it louder or just change the sound or both....???
thx
do you have a cat back system or stock, and in your opinion did the RT's make it louder or just change the sound or both....???
thx
I got the Corsa exhaust first then the RT. So I dont know how the RT alone would sound like with a stock exhaust.
Last edited by DJackman; Sep 15, 2005 at 09:38 PM.
Drifting
Joined: Nov 2004
Posts: 1,923
Likes: 62
From: California
Gutting out cats
Originally Posted by 05-C6
Rather than spending $600. on high flow cats, couldn't you just "gut out" the stock cats? I have a friend who put on a set of long tubes and he told me that he just "punched out" cats. He did, however, have to do something with the oxygen sensors.
Also, I dont want to deal with the Check Engine lights, the nasty smell, and not able to pass the smog inspection.
Thread Starter
Le Mans Master
Joined: Nov 2004
Posts: 7,242
Likes: 8
Originally Posted by Pingky71
I have a Corsa Sport, its not a cat back. The corsa sport is only the rear section without the X pipe. I still have the factory H pipe. The RT change the exhaust note to a much more agressive "higher pitch" sound and (in my oppinion) 40% louder at higher RPM (full throttle) than just the Corsa alone.
I got the Corsa exhaust first then the RT. So I dont know how the RT alone would sound like with a stock exhaust.
I got the Corsa exhaust first then the RT. So I dont know how the RT alone would sound like with a stock exhaust.