Quote:
Originally Posted by Armhunter
I have the FI test pipes and the stock Nismo exhaust and mine makes that sound and its annoying! I am hoping when FI installs my new exhaust it goes away! Mine is louder then yours and sounds like loose metal in the pipes. Has anyone changed their exhaust and notice it go away? That is what i am hoping for! Or I might go back to stock.
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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).