Scope of delivery: - 2x upgrade turbocharger Mitsubishi 49131-07031, 49131-07041 for BMW 135i, 1 Series M, 335i, Z4Description: The base chargers 49131-07031 and 49131-07041 have been modified as follows: - Milled compressor wheel - Compressor wheel with high flow rate - Extended tip to 30° - Rotor grinding at 14° - ( weight reduction possible ) - Adapted, reworked compressor housing - Power : 350 - 450 hpThe turbos are manufactured directly by a Mitsubishi distributor using original parts and are of course precision-balanced.fit for: - BMW 135i (E82/E87/E88) with engine N54B30A - BMW 1 Series M (E87) with engine N54B30A - BMW 335i (E90/E91/E92/E93) with engine N54B30A - BMW Z4 35i, 35is with engine N54B30A