4.000" - 4.060" Bore Piston Oil Ring Rail Spacer Support (0.020" Thick) Designed to bolt onto our

Designed to bolt onto our aluminum center sections and used with our various housing end applications

In addition

increases valve train life dramatically

Speedmaster shirts are the perfect way to let everyone know where you go for high performance aftermarket parts and accessories

but not included

4.000" - 4.060" Bore Piston Oil Ring Rail Spacer Support (0.020" Thick) Designed to bolt onto ourThese 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.