If the hiss occurs during acceleration then it's not normal and might be an exhaust leak. If the hiss is only occurring during decel then that is just a feature of the VQ motor although I can't recall anyone not running TP's or LTH's complaining about it.
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'11 370Z Nismo #528 Fast Intentions | Stillen | Motordyne | Uprev | CSF | Zspeed | Z1 Motorsports | AST | Swift | SPC | SPL | Whiteline | Hotchkis | Bride | Schroth | Robispec | Cusco | Nismo | Volk | Forgestar | Hoosier | RJM
'17 Titan Bone Stock
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