Hmmm.........
Question about hi-flow cats.
Thread Starter
Burning Brakes
Joined: Apr 2017
Posts: 988
Likes: 91
From: Milwaukee, Wis.
Question about hi-flow cats.
Over the weekend, I finally upgraded the stock exhaust, w/ a Pypes Violator axle-back system. Since it's basically a one piece system, I didn't want to tackle it myself, so I had a dealer just right down the road install it. So, after driving it around a bit this past Sat. I have to say I am a lil' bit disappointed. It is deeper (which is good) and like, maybe only 25% louder than stock. (which is not good)
I know it's not the Pypes system to blame, but rather the stock exhaust manifold and cats. ( I had a 2011 Mustang GT that had tubular headers from the factory, + a Roush axle back system, that I installed & it was loud !
)
So, could LG hi-flow cats alone (w/ stock exhaust manifolds still on) give me that extra little bit of sound I'm looking for?
Now I ain't want long tubes, because it is too much hassle time wise& price wise. Plus, you need tuning to go w/ that.
So, what do some of you exhaust experts have to say? I welcome and appreciate helpful info!
I know it's not the Pypes system to blame, but rather the stock exhaust manifold and cats. ( I had a 2011 Mustang GT that had tubular headers from the factory, + a Roush axle back system, that I installed & it was loud !
)So, could LG hi-flow cats alone (w/ stock exhaust manifolds still on) give me that extra little bit of sound I'm looking for?
Now I ain't want long tubes, because it is too much hassle time wise& price wise. Plus, you need tuning to go w/ that.
So, what do some of you exhaust experts have to say? I welcome and appreciate helpful info!
Last edited by SK '08; Aug 9, 2022 at 05:37 AM.
Drifting
Joined: Jul 2005
Posts: 1,634
Likes: 190
From: Austin TX
You may get a little more sound but not sure it would be worth it. You would have to have a shop do a custom exhaust job to get the cats installed. This may also add to a slight increase in sound. Any reason for not going with a full long tube set up? Here is a thread that was opened a few years back. About 6 or so posts down there is an option for cats for stock exhaust.
https://www.corvetteforum.com/forums...-question.html
https://www.corvetteforum.com/forums...-question.html
Retired & lovin' it!
Joined: Mar 2005
Posts: 4,475
Likes: 549
From: Jackson NJ
Hi-flo cats in addition to what you now have won't make that much difference. If you're really after a louder sound go with headers & then x-pipe with hi-flo cats. I'm running American Racing headers with their x-pipe/hi-flo cats & Corsa Sport exhaust. Outstanding exhaust note & really cool crackle & pop on downshift!
Safety Car
Joined: May 2016
Posts: 4,667
Likes: 1,849
From: Erlanger, Kentucky
A complete Z06 exhaust system with the NPP mufflers would make it sound a lot better.
Beyond that, a proper set of long tube headers (Kooks are the best), X-pipe, hi-flow cats going into a factory NPP is the best of both worlds; quiet when cruising, loud when you stick it. Everything else is just pissing in the wind.
Beyond that, a proper set of long tube headers (Kooks are the best), X-pipe, hi-flow cats going into a factory NPP is the best of both worlds; quiet when cruising, loud when you stick it. Everything else is just pissing in the wind.
Melting Slicks
Joined: Jul 2011
Posts: 2,800
Likes: 166
2023 C6 of the Year Finalist - Modified
Dump that China junk and get yourself a max volume system like Corsa Xtreme or Borla Atak. I run Corsa Xtreme because it controls drone way better than the Ataks I had. Bigger 4.5" tips and they are a little lighter than oem too.
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Instructor
Joined: Jan 2015
Posts: 140
Likes: 9
dump valves in front of the cats as well. I just don’t buy into the high flow cats. Plus if you don’t have them nobody can steal em from under your car. Why I’m 0/3 on cats and 1/3 with mufflers.
only car I have w mufflers are the Corsa extremes lol
Burning Brakes
Joined: Jul 2002
Posts: 1,136
Likes: 100
From: Nova Scotia
I don't believe anyone makes bolt in high flow cats. But if you did find some or get some made, you'd probably want a tune to turn off the secondary O2 sensors because you'd likely get a code without it
Banned Scam/Spammer
Joined: Aug 2022
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Hi-flo cats in addition to what you now have won't make that much difference. If you're really after a louder sound go with headers & then x-pipe with hi-flo cats. I'm running American Racing headers with their x-pipe/hi-flo cats & Corsa Sport exhaust. Outstanding exhaust note & really cool crackle & pop on downshift!