hi i haven`t a clue to be honest , it`s a late bay 2 litre box. for high hp turbo applications the insides would all need upgrading , only the ring and pinion and the casing is used . this box already has a type2 bell housing fitted in place of the type 4 housing . cogbox quoted me 2800 to build up the box making it capable of handling over 300 bhp , sounds like a lot but if you`re going for a big hp motor then this box will far outlast any type 1 built box.