Whats' a Jouce Shock? It's a hydraulic bump stop with tuning capabilities beyond those offered by any other manufacturer. Jounce Shocks are filled with oil and pressurized with nitrogen. They have externally adjustable compression and rebound circuits for on-the-spot tuning with a simple hex key. Jounce Shocks, produced by Light Racing, can be installed on a vehicle with otherwise stock suspension, and upon installation the vehicle will be imbued with a new level of suspension control. This is because a Jounce Shock comes into play during the last part of the suspension stroke, eliminating harsh bottoming and the abrupt rebound that usually comes afterward. Towing, crawlin' or haulin,' a Jounce Shock is unlike any other hydraulic bump stop available.