4.350" Bore Piston Oil Ring Rail Spacer Support (0.030" Thick) Set of 8 Speedmaster main caps improve reliability

Speedmaster main caps improve reliability in highly stressed engines by reducing distortion of the main bearing bores

They include a drain plug for clean and easy fluid changes

Speedmaster cast iron brake calipers are designed for 13" corvette conversion kits made by PCE

Our dual plane big block manifold is now available with rectangular ports

Speedmaster's PTFE braided stainless steel hoses feature a robust design with a seamless

4.350" Bore Piston Oil Ring Rail Spacer Support (0.030" Thick) Set of 8 Speedmaster main caps improve reliabilityThese 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.