Hello People Need your knowledge please? I am building (well mostley richard grindrod and bimmer bits is lol) a m50 turbo i have searched old threads and found some usefull info thanks for that i have the turbo plus the manifold already What i need to know is what i need to acheive my 500bhp,, Injectors 730cc? HELP where from and correct size? ecu DTA? HELP any others? completly lost on headgasket thickness and where to get one from?? arp head bolts,, i will get this 255 walbro,, i will get this does any have a number of someone who can help me with this Please??? Many thanks steve Sorted thanks to pro tune and doritech...