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

They're available in a variety of styles and can be used on most 1/4-20 thread air cleaner hold-down studs

Fits big block Chevy rectangular port cylinder heads on standard deck blocks

2 SFI Approved and will withstand the extreme power and rpm of your performance application

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.