Description Oil Restrictor Fitting Kit Size -4AN x 1/8 NPT, with 2 S.S.Jet s Material Aluminum Main Component with Stainless Steel Inserts Warranty One Year Limited Warranty Notes Features Allows you to effectively limit oil flow to your turbo, thereby minimizing the potential for damaging the oil seals in your turbo. Included - 2 threaded S.S. Jets (smallest restrictor is .030 and also included is a .045 restrictor). Without a restrictor the fitting is .060 oil passage.- Allen Key and Loctite.