VRP Losi 5IVE-B/5IVE-T 1/5 Shock Pistons have the same ‘quick rebound’ characteristics that the 1/8 scale XV3’s do. The pistons come with the Transition Valves (not installed). The Rebound booster hole has been precision drilled to the exact size found to be the best 'all around' setting. This yields excellent results that are proven on a variety of track surfaces. From rough, blown out tracks, to smoother surfaces, the VRP Piston makes a positive difference and gives you a big advantage over the competition! These pistons have four 2.0mm holes.