4.250" Bore Piston Oil Ring Rail Spacer Support (0.030" Thick) Set of 8 this pulley is designed to

this pulley is designed to provide superior durability and efficiency

Speedmaster piston rings feature: Plasma-moly coated

They're roll-threaded

28 Spline Daytona Pinion Bearings:PCE207

manual or EFI pump

4.250" Bore Piston Oil Ring Rail Spacer Support (0.030" Thick) Set of 8 this pulley is designed toThese Speedmaster piston oil ring spacers are used in applications where the piston oil ring groove intersects the pinhole. Speedmaster piston oil ring spacers are manufactured from spring steel and install against the bottom sill of the oil ring groove. Available in different bore diameters to suit your specific engine's needs, the Speedmaster piston oil ring spacers will keep your pistons working smoothly throughout the entire operating range.