You don't need valve springs dude. Get: - Wastegate ported, 38mm flapper valve and a 12psi or 15psi actuator - 4" airbox - Surge tank - Fuel pump - 60lb injectors - 4" dump and a good cat A retune with those mods and your current mods would give you over 370rwkw on 98RON and you won't know what hit you Eventually with that power you might need to do the clutches in the ZF but get a 'race' tune done then a mild tune (say 350rwkw) for everyday driving. With a ZF you'll munch almost anything on the road