Jims adjustable pushrods have superior strength and are the lightest on the market today (approx. 73 grams for Evo's and 67 grams for Twin Cams) and made from aerospace quality heat treated aluminum, with heat treated steel ends. No disassembly of the top end, or removal of the cam, is required. Pushrods have 24 threads per inch adjuster, with 3/8" balls on both ends. Available for Evolution Big Twin 1984 thru 1999 and Twin Cam models 1999 to present. Sold in sets of 4.