4.540" Bore Piston Oil Ring Rail Spacer Support (0.030" Thick) Set of 8 These covers are designed to

These covers are designed to directly replace your factory timing chain cover

capable of withstanding valve spring load

The Speedmaster shift selector shaft uses an O-ring to prevent leakage from GM TH400 cases

chrome mounting brackets

4.540" Bore Piston Oil Ring Rail Spacer Support (0.030" Thick) Set of 8 These covers are designed toThese 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.