On my old g35 coupe I got a greedy evo2 exhaust and it was hiss free after adding res test pipes. But all the exhausts for the 370z develop the hiss after hfc or test pipes from what I understand.
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09 370Z 6M PW - FBO Best 1/4 mile = 12.926 @ 109 SOLD -- 08 BMW 135i - FBO 12.1@120mph SOLD -- white 09 e92 335 Coupe Mtech - 11.9 @ 119 :-)
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