[EXTERNAL WASTEGATE REQUIRED]: This turbine housing is Free Float (Non-Wastegated). 1050 HP Top-End Monster: Equipped with a massive 68mm Inducer / 84mm Exducer forged billet compressor wheel. 1x Oil Restrictor Fitting (-4AN): You MUST install this restrictor on the oil feed line to prevent excessive oil pressure from blowing the ball bearing seals.