The MIP Bypass1™ pistons are fully customizable and allow you to truly control your cars rebound speed and performance. Featuring MIP Color Coded Valves™, the MIP Bypass1™ Pistons combined together with these valves allow you to control and maximize your cars performance based on which valves you use. Thicker valves generate a slower rebound and thinner valves get you quicker rebounds. Mix and match valves together and find the best set up for you and your car! MIP Bypass1™ pistons are being used by some of the top racers in the world including Adam Drake and Ryan Maifield.