S&S offers high-performance tappets for your 1984-1999 HD Evolution and 1986-1990 Sportster models. Only the finest materials and precision machining techniques are used to manufacture these lifters, and strict quality control ensures that they will work flawlessly every time, no matter what the application. Whether you have a stock 80 incher or the most outrageous big inch engine with a radical cam and spring combination, S&S tappets are built to take it.