4.350" Bore Piston Oil Ring Rail Spacer Support (0.030" Thick) Set of 8 The gears are precision-machined from

The gears are precision-machined from the highest quality aluminum silicon bronze alloy for maximum durability

O-ring seal is included

acceleration is more responsive

An engine with a 4340 billet steel crankshaft will rev faster and cleaner due to the different harmonics produced from the high grade material

High-volume water pumps have a ribbed aluminum housing and a heavy duty ball/roller bearing assembly

4.350" Bore Piston Oil Ring Rail Spacer Support (0.030" Thick) Set of 8 The gears are precision-machined fromThese 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.