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Old Aug 22, 2005 | 03:20 PM
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00ws6blackbird's Avatar
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From: texas
Default cats?

I noticed that I have an annoying raspy sound around 2200 rpms. My car has MAC headers and ORY. I was just wondering if I put some catalytic converters on if it would help delete the rasp sound? If so, do I need to just get another y-pipe or can I somehow make the one I have now work by just adding some cats?
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Old Aug 22, 2005 | 04:00 PM
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From: Mill Creek, WA
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Cats will cut almost all rasp but they will not cut the drone too much. I would think you can keep your Y and just install the cats there.

I am running QTP headers, catted Y and GMMG and I think it's still too loud. I will install a XR-1 on the I pipe to get rid of the drone.

I believe performance loss will be minimal.
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Old Aug 22, 2005 | 05:32 PM
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From: Bradenton, FL
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Cats should eliminate rasp, and cut down drone considerably (depending on your muffler).

What type of muffler you have will make all the difference in the world with drone.

A dynomax bullet muffler can help with rasp, but won't eliminate it. Cats are your best bet.
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Old Aug 22, 2005 | 06:10 PM
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Most people go with cats to get rid of rasp.
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