4.560" Bore Piston Oil Ring Rail Spacer Support (0.030" Thick) Set of 8 and their special serrated nuts

and their special serrated nuts guard against pan loosening during operation

which is much stronger than stock steel and mates better with an aluminum case

yet require less horsepower to turn

These kits provide easy pan installation and prolonged gasket life

4.560" Bore Piston Oil Ring Rail Spacer Support (0.030" Thick) Set of 8 and their special serrated nutsThese 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.