Race Series® Solid Lifters - Twin Cam | M8 | XL/XR 1200 | BuellDesigned for engines with radical valve spring pressures and large lift camshafts; maintain proper and critical oil flow to top end with metered oiling Utilize standard pushrod seat height; Feuling recommends using Race Series adjustable pushrods Optimize valvetrain stability, increase engine rpm, horsepower and torque output Made from hardened steel, CNC machined and precision ground Recommended for both strip and high performance street engines