Fits larger Garrett GT turbos, Precision, Turbonetics and BorgWarner AirWerks turbochargers with square oil return hole Oil return flange square hole for Garrett T3/T4 / AirWerks turbocharger Oil return flange with square hole and -AN 10 / Dash 10 male thread Fits larger Garrett GT turbos, Precision, Turbonetics and BorgWarner AirWerks turbochargers with square oil return hole For a long time no one offers the correct oil return flange and gasket for turbochargers with square oil return hole. Now TurboZentrum have these oil return flanges in stock ! Fits all GT40, GT4088R, GT4094R, GT42, GT4294R, GT4202R, GT45/45R, GT47 and GT55 Also BorgWarner AirWerks S200 / S200SX-E, S300/S300SX-E or Precision / Turbonetics T3/T4 turbochargers. Note: For this oil return flange we recommend our oil return seal with square hole pattern (item no. 3603000203). 2" / 51mm hole spacing CNC milled from 6061 aluminium anodised in silver to prevent corrosion thread suitable for every -10 AN / Dash 10 screw connection Square return hole for better drainage