4.560" Bore Piston Oil Ring Rail Spacer Support (0.030" Thick) Set of 8 These can be used on

These can be used on std or aftermarket plenum manifolds

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

Flat surfaces are finished with CNC machine center for accuracy and smoothness

Additional fittings may be required depending on your application

4.560" Bore Piston Oil Ring Rail Spacer Support (0.030" Thick) Set of 8 These can be used onThese 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.