No cat better sound

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Feb 21, 2012 | 08:15 PM

FAD2BLK93

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From: POULSBO WA.

No cat better sound

I am in the process of putting on my coated Mac mid lengths and i will be getting the Mac cat back. My cat is already hollow, and there is no emissions in my area of washington St. So do i remove the cat for better sound? Will i gain performance with less turbulance? Or should i leave it in place for some reson i don't know about? Enlighten me Thanks

Feb 21, 2012 | 08:30 PM

pillarpod

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From: South Dakota

if its hollow already, its not going to change the sound if you left it or if you put a pipe in there.

Feb 21, 2012 | 08:53 PM

FAD2BLK93

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From: POULSBO WA.

So i should remove it for a better straight through flow without the cat probably swirl effect maybe? Just guessing here, mainly wondering about sound then performance with the 503 cam if that matters?

Feb 22, 2012 | 06:23 AM

1QWKT/A

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Check your state emissions laws. Some states require a "visual" inspection of the cat upon inspection. If you have a friend who is a mechanic it shouldn't matter either way. I would assume having no cat would give you a less turbulent flow. Turbulence is a function of the radius of the pipe among other factors and the cat has a larger radius than an exhaust pipe would.

Feb 22, 2012 | 07:54 AM

FAD2BLK93

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From: POULSBO WA.

No emmisions at all where i live, visual or otherwise. Just go in show ID pay 50 get the tab...so great.

Feb 22, 2012 | 09:51 AM

SS RRR

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From: Jackstandican

Hollowed out cats sound like stale ***. You'll notice a good difference in sound if you put straight pipes in.

Feb 22, 2012 | 01:57 PM

wrd1972

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From: Central Kentucky

Quote:

Originally Posted by SS RRR

Hollowed out cats sound like stale ***. You'll notice a good difference in sound if you put straight pipes in.

I had a gutted cat on my jeep Wrangler and it sounded funky. Just drop the cat and install a "test pip" which is 100% legal as long as you are conducting "tests".

I have been running "test pipes" for many years trying to determine if catless exhaust contributes to global warming. As of now, the jury remains out but with that said, I will assume the Polar Bears are doing fine because I saw some lively ones on a recent Coca Cola spot on TV.