INTC28800B - Machined Piggyback Blue Shock Set (4) for Traxxas 1/10 Stampede 4X4 & Rustler 4X4. Upgrade the suspension of your Traxxas 1/10 Stampede 4X4 or 1/10 Rustler 4X4 with our Alloy Adjustable Rebound Piggyback Shocks. These shocks feature threaded alloy shock bodies, metal ball ends, adjustable pre-load collars, and adjustable piggyback reservoirs that are transparent to allow you to see the rebound preload.