most of people had tune his engine system well; intake manifold, turbo/supercharges, DME -> MOTEC, Exhaust manifold, catalist, exhaust pipe... :34: BUT they still MISS a very IMPORTANT PARTSSSsss, THE SHAFT in the CAR, just like the shaft in the MEN..look the attachment 1, A, B, C; 3 different screw driver and which one will be much easier to unscrew a very tight SCREW??? the easier the more power transfer ... :driver:see the attachment no.2if the 318i drive shaft swap with the M3 or 328i drive shaft together with its LSD will greatly increase efficient and TORQUE!!! THE RWD proved to be much more economy then the FWD vehicle, ln term of fuel consumption!!and power efficientcy!! he he he he... the STi gonna be smokedddd... :smokin: :burnout: