Thread: Berk HFCs on Factory Nismo Exhaust *RASP*
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Old 10-29-2012, 02:29 PM   #90 (permalink)
Armhunter
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Quote:
Originally Posted by suitepee View Post
Just my 2c, I had the following experiences:

1. stock nismo cbe / stock cats - no hiss
2. stock nismo cbe / berk hfc - very noticeable hiss
3. FI cbe (18") / berk hfc - still very noticeable hiss, maybe louder maybe not hard to tell with exhaust on there
4. FI cbe (18") / stock cats - very very minor hiss, probably wouldn't notice if i wasn't listening for it

So in my experience the HFC was really the culprit.. There have been new HFC's that are resonated i've been thinking about trying that may reduce the hiss while still giving some more gains...but for now i'm extremely happy with the sound of FI cbe + stock cats (DD).

My FI test pipes have the 18" res. on them.. still very loud Metal sounding hiss. Maybe I will call Tony and talk to him, he should know.
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