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

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Old 11-13-2010, 11:39 AM   #1
bigmike10camaro
 
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Need help with the cats delete ?

Im planing to buy kooks 1 7/8 headers and mid pipes for my 2010 camaro , ive been seening a bunch of mix reviews with this question , just trying to get the right answer, i had talk to some guy from slp performance , and he told me deleting cats will make me lose hp, he said something about the new camaros needed back presures to run good. I have 3" THR cat back with X Pipe , cats or no cats ????
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Old 11-13-2010, 12:07 PM   #2
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Quote:
Originally Posted by bigmike10camaro View Post
Im planing to buy kooks 1 7/8 headers and mid pipes for my 2010 camaro , ive been seening a bunch of mix reviews with this question , just trying to get the right answer, i had talk to some guy from slp performance , and he told me deleting cats will make me lose hp, he said something about the new camaros needed back presures to run good. I have 3" THR cat back with X Pipe , cats or no cats ????
Not true. Ted at Jenetty Racing did a Header test which included not only the different sizes of headers but also with and without cats. From what I remember he found that there was basically no loss or gain between the two.

Do a search and I'm sure you'll find the thread.
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Old 11-13-2010, 04:50 PM   #3
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Thanks for the info guess I'm going with the mid pipes and a tune
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Old 11-13-2010, 05:11 PM   #4
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A friend of mine added midpipes with hi-flow cats, and did report feeling a loss of low-end grunt via butt-dyno. A tune might take care of that, but back-pressure is a factor. Definitely consider a tune if you're not too attached to your warranty.
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Old 11-13-2010, 08:50 PM   #5
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Yeah not to worried about the warranty I have buddy that works at the dealer , just wanted to know what would be better cats or no cats , I'm a fan of deleting cats ,had it done to my gto and it sounded great , but like on my first post I read a bunch of mix reviews on this category
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Old 11-14-2010, 11:49 AM   #6
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A friend just had his cats removed and he gained about 25 rwhp. FYI, he has a supercharger on his car.

I use the same shop (IPS Motorsports) and IPS Brandon thought I could pick up similar hp if I deleted the cats on my car. I haven't decided what to do about that yet. I do have a Borla Touring exhaust with high flow cats, Kooks 1 7/8" headers, a Roto-fab intake, and a Magnacharger TVS 2300.
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Old 11-14-2010, 11:56 AM   #7
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the factory cats are a different story. they add quite a bit of back pressure...High flow cats will help alot. I removed mine completely...
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Old 11-14-2010, 12:08 PM   #8
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............but back-pressure is a factor.
Yes, less is better - unless you have too much cam.
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Old 11-14-2010, 03:53 PM   #9
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Well I'm playing to put Texas speed cam later on , but for now I just have k&n Cai , tom Henry racing cat back 3" , and soon to order 1 7/8 kooks headers and mid pipes.

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Old 11-14-2010, 05:13 PM   #10
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Guys at Kooks Headers told me there's only a few RWHP difference between their high flow cats and going catless (race pipe) with their long tube headers. But you'll definatly not loose power by going catless.

The biggest difference between going catless vs high flow cats is the noise level. Going catless is louder (not significantly but noticeable).


There's a good 15-20 rwhp (18 rwhp reported by several Camro5 members) to be gained by removing the stock cats from an otherwise stock Camaro (ADM race pipe for example). It seems the stock cats are the main bottle neck in the Camaro's exhaust.
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Old 11-14-2010, 05:21 PM   #11
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Thanks for the info on kooks headers
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Old 05-06-2011, 11:07 AM   #12
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And the resonators e sensors? If I remove the resonators, cats and the mufflers, I´ll put the sensors on the race pipes? Check engine will turn on?
My car is a 2ss V8 e-force supercharged.
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