1. Nismo has a differnt exhaust. The H-pipe instead of the non-nismo y-pipe. And with a factory re-tune it yeilds additional 18 more hp(not 30) over the stock. In general, you don't need a tune until you have done enough breathe mods - Intake + HFC/TP + CBE or more. Coz then you will have to correct your A/F ratio to pull it out of the danger zone and gain some potential hp out of the mods as well. Search for UpRev.
2. Besides others have mentioned, check if there is any aftermarket parts installed on the car, like CAI, CBE, HFC or TP... Those will decrease the car value and you don't want the previous owner messed on the car already. You want a stock car to begin with.
Good luck.
Last edited by forza370z; 02-25-2013 at 09:41 PM.
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