it all depends on how aggressive you want the als to be , and what its use is , i.e road / competition, for road use , personally ( not that , really i would use it for the road) i wouldnt modofy either the throttle body or the valve, it will work , it will just give you around -0.2bar of vaccuum rather than -0.7bar , just eases the off boost time thats all , rather tan spending the money on the body and valve try it 1st !!


hth

mark