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Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons Bolt-Ons | Intakes | Exhaust

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Old 10-11-2010, 12:43 PM   #1
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about to get long tubes headers cats or no cats

i know this has been discussed before but i would like to ask it again.

let me frist say i live in MI, and we do not have inspections. and its not that i am worried about. how much louder will it be with out cats. compared to with cats... i have a corsa cat back, i know this will be a loud setup. i like loud
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Old 10-11-2010, 12:49 PM   #2
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it will be louder w/o cats...but you're also probably going to get more drone. Also, you're not going to pick up much more (if any) power over hi-flows. The exhaust is also gonna smell worse. Not worth it IMO...unless you ONLY want it loud and don't care about anything else.
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Old 10-11-2010, 12:51 PM   #3
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Without CATS it is very loud and drone is loud. I know drove PQ's car around for 2 days. Sounds mean as hell but would drive me nuts all the time. Makes me think of just doing hi-flow cats down the road and forget the headers.
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Old 10-11-2010, 12:52 PM   #4
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Quote:
Originally Posted by POWERFREAK View Post
it will be louder w/o cats...but you're also probably going to get more drone. Also, you're not going to pick up much more (if any) power over hi-flows. The exhaust is also gonna smell worse. Not worth it IMO...unless you ONLY want it loud and don't care about anything else.
ya i dont want it to smell. guess cats is the way to go
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Old 10-11-2010, 01:13 PM   #5
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ya i dont want it to smell. guess cats is the way to go
That is usually my recommendation. There is really no extra power to be had by going without cats versus running high flow cats. Maybe 1-2 mid range horsepower.
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Old 10-11-2010, 01:24 PM   #6
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I think it just comes down to $$.
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Old 10-11-2010, 01:25 PM   #7
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no cats... its cheaper and sounds better IMO. oh and btw i dont notice any smell unless your outside the car.
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Old 10-11-2010, 01:38 PM   #8
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Personally, I don't know what the whole fuss about smell is all about. My bud has a Mach One without cats, and unless you are right behind the car you won't even notice it. Most people on here say that no cats doesn't affect the sound much, but in my experience it is incredibly louder, and the tone tends to be more raw.
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Old 10-11-2010, 02:40 PM   #9
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I have had no cats and high flow cats. I like the high flow cats.

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Old 10-11-2010, 03:35 PM   #10
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like the way it smells without cats. And no cats give more of an aggressive sound imo
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Old 10-11-2010, 04:04 PM   #11
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Old 10-12-2010, 09:05 PM   #12
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only difference is without cats the exhaust is more of a raw sound. with cats it just smooths it out a little. Oh and you may smell the exhaust a bit more but i doubt it, i havent noticed it without cats.
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Old 10-12-2010, 09:08 PM   #13
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well i called my local shop today and decided to get cats.. my dad would be kind of mad if he had to smell that in the garage anyways... and with corsa its going to be loud enough for me .... thanks for the help
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Old 10-12-2010, 09:12 PM   #14
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I just got no Cats. Sounds good. As far as smell I think it is just part of the new still burning off. They were super easy to install. If are a wrencher I recommend doing it yourself.
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Old 10-13-2010, 10:22 AM   #15
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I have SW LT's, no cats, stock catback. I'm happy with it, it is a bit louder than I anticipated (having had the same setup on my 4th gen) although it's not at all obnoxious. Problem with this is it's all relative to what you like / think sounds good.
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