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Old 09-29-2009, 06:15 PM   #15 (permalink)
AH370Z
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Join Date: Jun 2009
Location: Australia - Sydney
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Drives: 11' 370z, 13' E92 M3
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Quote:
Originally Posted by boardingnath View Post
Has anyone got the link to the thread on returning to stock cats?
Hi-Flow Cats too loud!

Quote:
John
I saw your posts about exhaust being too loud with the HFC.

I'm someone thats a bit concerned about the constant humm through the cabin.

Just going with the Stillen CBE and stock cats, is there a change in cabin noise in normal cruising?
Can you tell that the exhaust has been upgraded with the stock cats

Thanks
--------------------
Hi there,
I have a pretty good knowledge base of after market exhausts and can tell you that the 370z reacts a little different than other cars with the addition of HFC's. It is night and day. Taking off the Berk cats and re-installing stock eliminated cabin drone completely and quieted the car by over 75% while still sounding a little "sporty" with just the Stillen CBE. If you are concerned with drone, cabin noise or anything of the sort, stay away from HFC's. Good luck!
So i've made my decision

Last edited by AH370Z; 09-29-2009 at 06:23 PM.
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