well here's my 2 cents if you like. If I had it to do all over again, I'd do the springs, upgrade the brakes (you have sport so probably ok), get a good LSD (mine was open non-sport, so this was an essential upgrade for me) I believe the stock has a VLSD anyway. I would do that first before any thinking about anything to the engine? why? It certainly sounds cool but for the kind of money I've spent on the Z I think I could have modded my 97 Z-28 into at least an 11 sec car. seriously. I wouldn't touch anything on the engine and would just save initially and do track days until I could afford to do a supercharger or twin turbo then get into some bad-assery!!!! good luck, either way t'is up to you just offering up what I would do if I could do it again...
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2009 370z Touring 7AT/AAM 2.5 true dual exhaust/AAM DE test pipes/z1 vqde35 headers/AAM cold air intake (R-line)/Motordyne M370/Quaife LSD/z1 brake upgd pkg/Swift Spec-R springs/WhiteLine Front&Rear sway bars with endlinks
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