um well 2.5inch mandral bent exhaust from manifold, 3inch dumpi pipe, high flow cat, 3.5inch stainless steel muffler, 400hp bosh fuel pump, T03 high flow turbo, type 3 bov, huge hybrid front mount cooler with 3inch piping, massive K & N cold air intake filter (300mm), 15psi boost, R32 gerabox, clutch, flywheel, LSD - um i guess thats about it as far as the mods to the engine goes - put it this way the car goes very nicely - but there is always room for improvement.