I wanna get uprev to tune my g35 the mods i have are: Intake, exhaust, headers, test pipes, pletnum spacer, TB spacer and 75mm TB. If i give that info to uprev and they send me a base tune how much HP could i gain without getting it dyno tuned ( i also have a 50 shot of nitrous)

 

15-20whp is my guess. PM the user @seymore4 he is an Uprev tuner and very knowledgeable on the subject.