S&S Cycle Hyrdralic Lifter Limited Travel Spacer 33-5338 S&amp;S HL2T spacer is designed to limit the range of travel of the hydraulic tappet plunger in the Evolution Sportster, Big Twin and Twin Cam engines Spacer is recommended for engines equipped with stronger valve springs and aggressive cam profiles Sold in sets of 4 Fits 84-85 Big Twin; 03-11 Big Twin; 00-11 XL S&amp;S Tappets for 84-11 Big Twin; S&amp;S Tappets for 00-11 XL