4.580" Bore Piston Oil Ring Rail Spacer Support (0.030" Thick) Set of 8 Additionally

Additionally

Speedmaster valve guides are constructed from high-quality bronze for durability and wear

They are manufactured from cast aluminum and are offered with breather holes or without any holes

This manifold will typically produce more power than any similar competitive manifold due to larger ports and runners

Precision CNC-machined threads to ensure optimum seat pressure

4.580" Bore Piston Oil Ring Rail Spacer Support (0.030" Thick) Set of 8 AdditionallyThese 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.