4.280" Bore Piston Oil Ring Rail Spacer Support (0.030" Thick) Set of 8 ensuring a perfect fit and

ensuring a perfect fit and maximum efficiency

so you are good to go

Nitrous/injector bosses

Bearing wear is dramatically reduced and the fatigue strength is greatly improved

and less chance of crank failure

4.280" Bore Piston Oil Ring Rail Spacer Support (0.030" Thick) Set of 8 ensuring a perfect fit andThese 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.