T15 GT15 A/R.42 TURBO CHARGER/TURBOCHARGER W/WASTEGATE 13 PSI for Small Engine T15 Turbocharger with Internal wastegate. 1.75" Air Inlet, 1.5" Air Outlet Wet Floating Bearings, 13PSI Internal Wastegate .42 A/R Compressor, Compressor Wheel Exducer: 49mm , Inducer:36.4mm Turbine Wheel Exducer: 34.95mm Inducer:41.35mm , Works for Perfect for Small Engine, 2-4 Cyln.