If your on a budget,go the chip route & Dr Rossi comes highly recommended on here,& the get your TB's set up,useually costs about £20,chips are easy to change,just make sure you dont use a magnetic screwdriver or something like that,Ive got a proper chip puller from work & a anti static wrist band,but like I said chip & Tb setup,sorted,a PC3 will smooth out the running but on mine I only gained 4 bhp at the top & it buggerd it up below 3k,Pc 3 now removed until I can get Griffs mate to sort it,money allowing & 500 mile round trip