RPM set also includes a set of twelve, three sets of four pistons. (red, green, & purple) Best used on tracks with moderate to major obstacles, or on heavier vehicles such as the Stampede, T-Maxx, & E-Maxx. Check out our Piston FAQ page for more information.
Important Note: These pistons only fit stock, molded Traxxas shock bodies. Some slight sanding with a fine grit sand- paper on the diameter of the pistons is required to get them to fit inside Traxxas Big Bore Shocks.