40" 4AN Oil Feed Line For Holset's Cummins' HX35 HX40 HX50 HX55 M12 2. – buysmartturbo
Amazon.com: Turbo Oil Feed Inlet Flange with Gasket 4-AN Adapter Kit,AN4 W/Built In Restricter and Bolts Compatible with T3 T3/T4 T04 T4 For Ball Bearing Turbos : Automotive