My car has a horrendous rasp with FI test pipes, not at all a "hissing" noise.
From 2500rpm and up on accelleration, and then at about 4000rpm and down on decel. I think it sounds absolutely terrible and not classy.
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-'11 Gun Metallic Nismo 370z
-'12 WRB STi hatch
-'99 2.5RS coupe
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