S&S CYCLE Hydraulic Tappets - Evolution Big Twin | XL 33-5352

Hydraulic Tappets - Evolution Big Twin | XL
Rollers have a larger-than-stock inner bearing race that reduces stress and increases axle life, Each lifter body and plunger assembly is hand-fit and pressure-tested to ensure correct operation, Redesigned plunger assembly withstands forces associated with heavy-duty valve springs and pushrods typically used in high-performance applications, Revised metering device precisely controls oil delivery to top end, ensuring rapid lifter pump-up and reducing possibility of oil starvation to bottom end, Made in the USA