Best bet is probably GT Haus paired with some HFC's since you don't want to eliminate the cats. fwiw a Z34 with full GT Haus CBE is almost as loud as my Z with LTH's and F.I. non-res CBE.
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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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