This is a replacement CRC Encore Plastic Shock Part Set, and is intended for use with the CRC Gen-X family of cars. This package includes the piston, piston bushing, ball cup ends and spring perch for the Encore shock. The ballcups lock on the ball studs extra firm with a positive snap . In addition, the shock piston is resized and shaped to be super smooth in the shock body. The new plastic greatly improves the performance of the shock! Includes all the plastic; piston, piston bushing, multiple ball cup ends and spring perch. Released Oct 1, 2018