4.165" Bore - 1.5 - 1.5 - 3mm Plasma Moly Piston Ring Set - Zero Gap These Speedmaster head bolt bushing

These Speedmaster head bolt bushing kits allow you to use stock or aftermarket head bolts with Speedmaster or other aftermarket cylinder heads

durable Speedmaster aluminum crank hub

These kits reduce the power-robbing windage created from the excess oil draining past the rotating assembly and keeps the oil flowing where it is needed most

Couple this Hi-Ram intake with the high flowing Ford Coyote style cylinder heads has outstanding potential for naturally aspirated and forced induction applications

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

4.165" Bore - 1.5 - 1.5 - 3mm Plasma Moly Piston Ring Set - Zero Gap These Speedmaster head bolt bushing