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S&S Hydraulic Tappets fit all Harley-Davidson Evolution big twin engines and 1986 - 1990 Sportster models. They also are used in S&S engines for 1966 - 1984 big twin chassis. These tappets feature numerous significant design improvements and are perfect for stock replacement as well as high performance applications.
- Larger inner bearing race reduces stresses to increase axle, bearing, and roller life. The S&S inner bearing race is .123" larger in diameter than the "raceless" roller axles currently used by some manufacturers.
- Improved inner race-roller design allows use of more, and larger bearings to increase load-carrying surface area, further reducing stress and wear in the critical roller area.
- Redesigned plunger assembly better withstands forces associated with heavy-duty valve springs and cams typically used in high-performance applications.
- Revised metering device precisely controls oil delivery to top end, insuring rapid lifter pump-up and reducing possibility of oil starvation to bottom end.
- Each lifter body and plunger assembly is hand-fit and then pressure-tested to insure correct operation.
- Set of four, without HL2T limited travel kit
100% Made In America. Part #33-5352