4.280" Bore Piston Oil Ring Rail Spacer Support (0.030" Thick) Set of 8 Speedmaster lightweight crankshafts are perfect

Speedmaster lightweight crankshafts are perfect for engines wanting quicker rpm

and less chance of crank failure

Too little oil causes stem and guide wear

so you are good to go

4.280" Bore Piston Oil Ring Rail Spacer Support (0.030" Thick) Set of 8 Speedmaster lightweight crankshafts are perfectThese 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.