SPR847 - SPEED PRO ROCKER ARM FITS WINDSOR CAST SELF ALIGN SINGLE

These rockers are similar in design to the ones originally used on most engines, but incorporate features and improvements which make them a useful upgrade for a budget conscious engine builder. Careful attention to detail in manufacturing insures accurate ratios. Hardened steel alloys deliver long life at the fulcrum, valve and pushrod seat areas. Longer stud slot allow these rockers to work with higher lift cams. Optional ratios are available for popular engines, offering a low cost method on enhancing performance.