Speedmaster PCE308.1018 4.000" - 4.060" Bore Piston Oil Ring Rail Spacer Support (0.030" Thick)

These PCE piston oil ring spacers are used in applications where the piston oil ring groove intersects the pinhole. PCE 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 PCE piston oil ring spacers will keep your pistons working smoothly throughout the entire operating range.