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Old Dec 10, 2019 | 12:48 AM
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Default C6 cat delete

I have a 2012 corvette base meaning I have 4 cats which sucks, I have the npp mufflers from a z06 welded to my stock over axle pipes, then I want to keep my stock h pipe and delete my cats (I DO NOT want long tube headers) just stock manifolds and I was wonder is there anywhere I could get the mid pipe cats deleted or if I could buy off road or test pipes anywhere??

maybe I could run test pipes or cat delete pipes if there are any, and then maybe a catless h pipe? Or I could buy 2.5 inch diameter exhaust pipe and cut the cats out myself and have a weld shop just weld in the pipes?

Last edited by Matthew Awdish; Dec 10, 2019 at 01:09 AM.
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Old Dec 10, 2019 | 01:28 AM
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Originally Posted by Matthew Awdish
... I have 4 cats which sucks...
Why?
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Old Dec 10, 2019 | 02:03 AM
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Originally Posted by 919cw313
Why?
cause I want my car loud and in order to remove the cats I have to probably buy headers and an x pipe but I like the stock h pipe and how it pops a ton and many people say the x pipe takes that away
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Old Dec 10, 2019 | 07:49 AM
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Originally Posted by Matthew Awdish
cause I want my car loud and in order to remove the cats I have to probably buy headers and an x pipe but I like the stock h pipe and how it pops a ton and many people say the x pipe takes that away
I have LT headers and an off road X-pipe with NPP exhaust and it pops and gurgles louder than stock ever thought about doing.
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Old Dec 10, 2019 | 07:52 AM
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Cats won't make your car majorly quieter. The factory manifolds do, and the OEM npp mufflers do. The h pipe vs x pipe wont make a huge difference, it will be mainly in the tune. A good tuner will be able to give you all the pops you can handle after long tubes.
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Old Dec 10, 2019 | 09:43 AM
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I think you can use a 2009-2011 X pipe. It is the same but without the extra cats. If I understood you correctly. The part number is 25839150.

Last edited by 88redconvert; Dec 10, 2019 at 09:51 AM.
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Old Dec 10, 2019 | 10:18 AM
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Originally Posted by 88redconvert
I think you can use a 2009-2011 X pipe. It is the same but without the extra cats. If I understood you correctly. The part number is 25839150.
Actually this is a good point. The OP has a 2012, and thinks it has an h pipe. A 2012 has an x pipe from the factory.
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Old Dec 10, 2019 | 10:21 AM
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Originally Posted by Matthew Awdish
I have a 2012 corvette base meaning I have 4 cats which sucks,

maybe I could run test pipes or cat delete pipes if there are any, and then maybe a catless h pipe? Or I could buy 2.5 inch diameter exhaust pipe and cut the cats out myself and have a weld shop just weld in the pipes?
are you sure you have 4 cat's and not only 2? you should have 4 O2 sensors.
if your cat's are doing their job, they shouldn't being adding any restriction to flow or noise. plus, if they are working correctly, will also aid in having your car run its best. I do agree that the stock set up, even with the NPP option, is a bit tame.
swapping in headers would be a big change. my recent cam upgrade did a lot to exhaust sound.
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Old Dec 10, 2019 | 10:27 AM
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I've got stock manifolds with an extremely loud exhaust that pops & gurgles. I'll make you a good deal on it after I install the NPP axle back I have coming.
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Old Dec 10, 2019 | 01:33 PM
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I have a 2012 GS, same exhaust as your car. Magnaflow used to make test pipes (connection pipes from the stock manifold to x pipe) that were direct bolt on for LS2 cars. I linked them down below. They no longer make these you have to buy them second hand, but they are a direct bolt up to the LS3 manifolds. I put them on my 2012 GS and yes, it makes the car 1000x louder.

https://www.corvetteforum.com/forums...est-pipes.html

Last edited by Kjs222; Dec 10, 2019 at 01:34 PM.
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Old Dec 10, 2019 | 02:37 PM
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Originally Posted by FAUEE
Cats won't make your car majorly quieter. The factory manifolds do, and the OEM npp mufflers do.
Installing an off road x will most certainly drastically increase sound volume.
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Old Dec 10, 2019 | 06:06 PM
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OP, You can buy an off road X pipe which will come with no cats, a straight bolt up to your stock manifolds & mufflers, the result will be an obnoxious sounding smelly car that you won't like & pollutes our air, don't do it
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Old Dec 10, 2019 | 10:57 PM
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cats make no difference in power or sound, and you could be creating headaches for yourself. There is no need to delete cats with stock manifolds, or even Z06 manifolds.
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