4.290" Bore Piston Oil Ring Rail Spacer Support (0.030" Thick) Set of 8 2 SFI Approved and will

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

Speedmaster's velocity stacks are chrome plated with a steel mesh top

barrel-shaped

1966-72 (1973 non-CA) passenger cars

Speedmaster has already done the work for you

4.290" Bore Piston Oil Ring Rail Spacer Support (0.030" Thick) Set of 8 2 SFI Approved and willThese 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.