The ST Racing Concepts CNC Machined Aluminum front racing shock sets feature threaded aluminum shock bodies with O-ring installed pre-load collars in which the O-ring secures your pre-load adjustments in place. Threaded shock bodies allow for very precision ride height/spring pre-load adjustments, while the shocks also feature aluminum lower shock caps to keep the shock cartridge straight and flex free during suspension operation and heavy suspension compression. Also works on Slash 2WD Short Course Truck. Compatible with: Slash 2wd, Slash 4x4, Stampede 4x4, Bandit, Rustler, Monster Jam vehicles (Use Grey Ultra Shock internals)