4.000" - 4.060" Bore Piston Oil Ring Rail Spacer Support (0.020" Thick) the least runout

the least runout

If you're completing the installation of a Speedmaster electric water pump

That means you get more airflow headed down the carburetor or throttle body and into the combustion chamber

These chrome water necks from Speedmaster add a touch of class to your cooling system

This crank support system is a must have for all small block chevy racers with a supercharger

4.000" - 4.060" Bore Piston Oil Ring Rail Spacer Support (0.020" Thick) the least runoutThese 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.