MIP Bypass1 Kit:TRA 10mm Big Bore Shocks,SLH,RU,ST MIP patent-pending RealShocks Bypass1 Piston. Now Full Scale Bypass Technology engineered for RC Race Cars! Precision machined pistons made from bearing grade plastics. Color-coded valves for easy set-up and assembly. Octogon shaped pistons to reduce drag and keep the piston guided in the shock bore! Dyno Tested to match the rebound flow of stock pistons! Direct replacement from stock shock pistons, no modification