S&S Cycle SS33-5352 Precision Performance High Capacity Lifters for Harley-Davidson Big Twin 84-99/Sportster 86-90S&S offers high performance tappets for 1984 '99 HD Evolution and 1986 '90 HD Sportster. These tappets are a great choice for any stock or high performance application. Only the finest materials and precision machining techniques are used in the manufacture of these lifters, and strict quality control insures 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