cat vs. sound level question
Thread Starter
Drifting
Joined: Feb 2006
Posts: 1,585
Likes: 15
From: New Hartford IA
cat vs. sound level question
I've had the 3" high flow cats in my LG pro/borla stinger exhaust setup since I bought the car years ago. Just wondering how much the cats actually quiet the car down? Since they are a slip fit it's kind of a pain to r&r them so just looking for others that have heard the difference. Back to back results would be nice if possible.
I'm not interested in the emissions topic so lets just keep this a sound level/quality discussion. I've been debating removing them for the track/strip and possibly adding a quieter exhaust. Any input would be much appreciated
I'm not interested in the emissions topic so lets just keep this a sound level/quality discussion. I've been debating removing them for the track/strip and possibly adding a quieter exhaust. Any input would be much appreciated
Pro
Joined: May 2004
Posts: 551
Likes: 19
From: Morgantown WV
I've had the 3" high flow cats in my LG pro/borla stinger exhaust setup since I bought the car years ago. Just wondering how much the cats actually quiet the car down? Since they are a slip fit it's kind of a pain to r&r them so just looking for others that have heard the difference. Back to back results would be nice if possible.
I'm not interested in the emissions topic so lets just keep this a sound level/quality discussion. I've been debating removing them for the track/strip and possibly adding a quieter exhaust. Any input would be much appreciated
I'm not interested in the emissions topic so lets just keep this a sound level/quality discussion. I've been debating removing them for the track/strip and possibly adding a quieter exhaust. Any input would be much appreciated
Le Mans Master
Joined: May 2007
Posts: 5,393
Likes: 17
From: Belleville Mich.
catless
Ed, Putting on the LG Pros, Xpipe & Hi flow cats was one of the first things I did , I kept my Ti exhaust. When I purchased the system, I also bought the by pass pipes to slide in the place of the Hi flows. I only ran the cats for about a month, before sliding in the by pass pipes. It made the system just a bit louder. I mainly did it for the few x tra ponies. I've recently switched out the Ti system & went w/ BB Bullets. The new system is much,much louder & engine seems to rev up faster. The Bullets are the sound that I like best. If you're constantly reving up on the street, evently you will probably get a noise violation. Oh, when I took the cats off(over 4 yrs ago) I have never smelled a rotten egg. You get more of an exhaust smell. If you do decide to go w/ the bi pass pipes, make sure you put plenty of anti seize @ the slip joints, to make things eazy if & when you deside to switch again. Good luck. Bob
Drifting
Joined: Nov 2004
Posts: 1,650
Likes: 4
From: Ringgold GA
Cats greatly reduce the sound of the exhaust, I put high flow cats in my system to reduce the exhaust smell but it quietened the car so much I took them back off and decided to live with the smell since it's not a daily driver.
Drifting
Joined: Oct 2002
Posts: 1,335
Likes: 76
From: Bedford Va.
this is the second time I have pulled the cats.
LGM pro's, 3" pipes and TI muff.
the sound is great-civil at low RPM's and produces a strong level when pushing the car. Cam shines through a little more.
Borla stingers? might be a little much, you won't know till you try.
LGM pro's, 3" pipes and TI muff.
the sound is great-civil at low RPM's and produces a strong level when pushing the car. Cam shines through a little more.
Borla stingers? might be a little much, you won't know till you try.
Burning Brakes
Joined: Oct 2003
Posts: 816
Likes: 0
From: peabody ma
I was went catless with my header install with borla stingers, but it was way too loud for me so i bought the fleabay hi-flow cats and it definately quieted it down to a respectable level...i then bought an X pipe and that helped get rid of the explosions when decelerating......I still get a little drone at 1500 rpm but its livable
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
Thread Starter
Drifting
Joined: Feb 2006
Posts: 1,585
Likes: 15
From: New Hartford IA
Thanks for the response guys. As you can see in my sig the car is no cupcake in the power department NA wise. I've since added some rockers and a ported fast 90 in search of 500+ whp. The big power NA cars tend to be loud so I don't want it to get to crazy. I guess I just have to figure out what I want out of it and go from there. I'm not sure if a quiet exhaust without cats would make the same power as say my stinger/catted setup. It's probably splitting hairs at this point. I love the sound, but even with the high flow cats the exhaust can drone a lot at lower rpm.
Does anybody have a before and after dyno run with the lg pro cats in/out? I've heard ~5rwhp is about the cost of the cats, but if they keep the sound levels down it might be worth keeping them.
Does anybody have a before and after dyno run with the lg pro cats in/out? I've heard ~5rwhp is about the cost of the cats, but if they keep the sound levels down it might be worth keeping them.