Fuel Moto Street Outlaw cylinder heads are designed for maximum horsepower & torque in high output applications and are based on S&S Super Stock castings. FM Outlaw heads are fully CNC machined including the ports and combustion chamber. Works excellent on 107", 110", 117" & 124" applications, Fuel Moto has special pistons available for many combinations. Heads are brand new, no core charge required.