| I'm sure you have it so here is a short list to achieve that goal: Stage III long block w/ JWT #500 Cams 2.5" intercooler piping ***Ash Massives*** Z1 58MM TBs Nismo 740cc MSP Mani SZ SS 3.0 DPs SZ 3.0 TP & CAT BACK 1pc Drive shaft NISTUNE or Zem Dyno tune by a Pro Even with all this, you still may be borderline 600rwhp on pump 93. As a lawyer would say…”It's doable but not practical if you want it to be a safe tune…it depends” ======================================== I too have the 675 and just peaked over 500rwhp on the dyno using 93 pump. I'm using Z1 SMICs with AshSpecZ 2.5" mod in/out piping. I feel like an #ERROR Id10ID10 now because the cost to mod them to 2.5” inlet/outlet put me over the cost of buying AshSpecZ Massives flat out. Doh!!! Do yourself a favor and buy the AshSpecZ Massives and 2.5" piping and larger Z1 TBs. For that kid of RWHP you're seeking, the input Air [MUST] have minimal restriction. Don't forget that exhaust flow (diameter) out should be equivalent or better to the Air flow (volume/diameter) in as a rule of thumb. I’m no expert so don't take my word for it; allow some of the real professionals to chime in. Good luck, and off you go! (recommend you get Ash Massives :)
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