S&S Hydraulic Tappets / Lifters For Harley Pan And Shovel Hydro tappets provide dependable cam timing and ensure quiet operation in engines. Designed for longevity and reliability, these components eliminate noise while maintaining optimal performance, contributing to a smoother running engine. Features: Precision-machined and heat-treated bodies Premium-quality anti-pump-up hydraulic inserts Eliminate noise from the mechanical valve train Sold as set of 4 Made in the USA