I have the F.I. resonated TP's and the F.I. 18" CBE. The hiss is definitely there just like you described it. When letting off the gas it hisses till just under 2000 RPM. TP's will not get rid of the hiss. Doesn't really bother me anymore since ive gotten used to it, and with the radio on at all i dont hear it, just the nice low growl from the F.I. setup. More than likely the TP's will make it worse then it is now.
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Vlad
2010 370Z MB Persimmon Touring/Sport/Nav 6MT | K&N Typhoon | F.I. 18" CBE #661 | F.I. Res. TP | NISMO Sway Bars |
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