u can go for kpro if u already change ur i/h/e ..intake,header,exhaust..if u put kpro 1st..u'll spend more on tuning..and yes..kpro will make a lot of different than stock..hope this helps..
I've always been curious about how much thought Skyline owners put into the handling aspect of their rides. It seems that most of the threads on this forum seem to lean more towards modifications that...