09-29-2009, 05:15 PM
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#2 (permalink)
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Base Member
Join Date: Jun 2009
Location: Australia - Sydney
Posts: 167
Drives: 11' 370z, 13' E92 M3
Rep Power: 16
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Quote:
Originally Posted by boardingnath
Has anyone got the link to the thread on returning to stock cats?
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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
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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!
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So i've made my decision 
Last edited by AH370Z; 09-29-2009 at 05:23 PM.
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