Billet Tappet Blocks For Big Twins Constructed from solid 7075 Aluminum Billet and polished to a high luster.
Great custom looks and almost three times stronger than stock.
Page Tappet Blocks for Evolution Chrome, Die cast aluminum. Fits Evolution Big Twins 1984-up. Jim's Billet Tappet Blocks Polished billet tappet blocks are precision machined from 7075-T651 aluminum. Chrome Billet Lifter blocks Machined from 6061-T6 Aluminum. Lifter Blocks Designed to be stronger, and wear longer than the stock lifter blocks.