INTC28802B - Billet Machined Piggyback Blue Shock Set (4) for Traxxas 1/10 Slash 2WD & Nitro Slash. Upgrade the suspension of your Traxxas 1/10 Slash 2WD & Nitro Slash with our Alloy Adjustable Rebound Piggyback Shocks. These shocks feature threaded alloy shock bodies, adjustable pre-load collars, and adjustable piggyback reservoirs that are transparent to allow you to see the rebound preload.