FEULING PARTS 0929-0090 4056 Race Series® Solid Lifters - +0.843" to 0.8435" Oversize - Twin Cam | XL | Buell | M8Features Designed for engines with radical valve spring pressures and large lift camshaft Optimize valvetrain stability at high rpm, decrease valve float, maintain maximum valve lift, increase horsepower and torque output CNC machined and precison ground with 0. 700" diameter rollers maintaining proper and critical oil flow to top end with metered oiling Utilizes standard pushrod seat height Made in the USA Notes Feuling recommends the use of Race