The Dirt King spec bypass shocks were developed specifically for our long travel race kits with a custom tube layout, custom valving, and custom hose lengths. Bypass shocks allow for superior suspension dampening by allowing adjustment of the compression and rebound throughout the shock travel. To fine tune the ride quality a shock tech can quickly make adjustments without removing the shocks from the vehicle. Please note that bypass shocks are noisy due to the steel needle that engages and disengages when fluid bypasses the piston.