4.290" Bore Piston Oil Ring Rail Spacer Support (0.030" Thick) Set of 8 1966-72 (1973 non-CA) passenger cars

1966-72 (1973 non-CA) passenger cars

for the Ford Coyote (2015-2020)

Speedmaster valve guides are constructed from high-quality bronze for durability and wear

The next level of performance are these cast-iron Chevy LS blocks

barrel-shaped

4.290" Bore Piston Oil Ring Rail Spacer Support (0.030" Thick) Set of 8 1966-72 (1973 non-CA) passenger carsThese 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.