From everything I've seen it all depends on what you want. The PPE's are best for top end and the F.I.'s are best for mid range.
IMHO mid range power is more useful than just having a a dyno queen.
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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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