These Schumacher Racing Products eccentrics are a factory replacement set for the CAT L1 EVO, Cougar Laydown, and Storm ST platform vehicles. Sold as two pairs, they are used to adjust motor or differential positioning within the gearbox, allowing drivetrain mesh to be dialed in precisely. Two of the pieces feature small positioning holes and two feature slotted profiles, indicating different adjustment configurations within the set. Features: Includes two pairs of eccentrics Two hole-style and two slotted-style pieces for different adjustment positions Drivetrain mesh adjustment for gearbox assembly Schumacher Racing Products factory replacement part 7/7/26 cs