JE Pistons 4.5-4.529in Bore Oil Rail Support

JE Oil Rail Supports feature a special locking detent to prevent rotation of the oil rail and keep the rail support gap 90? from the pin bore opening on the piston. This JE exclusive feature prevents the rail from rotating in the oil ring groove. Oil Rail Supports prevent the oil ring rails from spiraling off of pistons with short compression distances. Piston Oil Rail Support, 4.500 in. Min Bore, 4.529 in. Max Bore, 0.203in. Radial Depth, Each.