Quote Originally Posted by patrick4588
you dont know what you are talking about
Unless your running a built motor and a huge turbo, why do you need 3" IC piping? The bigger the pipe you have w/ a small turbo, the longer it takes to spool up. I think 2.5 or 2.75" would be just fine for up to 450 hp. I have installed many turbo kits on the 350Z and the cold side of that setup was around 80mm which is a little over 3" and it worked good on a 3.5L but I think it would be a little much on a GSR. IMO What size turbo are you running?