ADS Racing Shocks external bypass options are designed around racing first and foremost, performance reliability and longevity are primary concerns when determining flow rates and zone placement. Multiple zones allow end users to dial in the damping curve to driver and chassis type. Enhanced flow in critical areas reduces heat buildup and harshness, these reductions in restriction amplify traction potential and driver control. Large capacity reservoirs aid in cooling as well as reducing pressure gain in the system. Large diameter shafts increase strength for extreme applications and stand up to the abuse of racing time and time again. All these features together deliver a bullet proof bypass shock that is guaranteed to perform on your race car or weekend warrior. Bypass Shocks 4.0 in. 16 in. Stroke 7 Tubes Style 1