4.250" Bore Piston Oil Ring Rail Spacer Support (0.030" Thick) Set of 8 Speedmaster piston rings feature: Plasma-moly

Speedmaster piston rings feature: Plasma-moly coated

this pulley is designed to provide superior durability and efficiency

They're available in a variety of styles to suit your needs

Instead of spending the time and money refurbishing your existing heads

Speedmaster finned aluminum valve covers are the perfect fit for your engine

4.250" Bore Piston Oil Ring Rail Spacer Support (0.030" Thick) Set of 8 Speedmaster piston rings feature: Plasma-molyThese 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.