Did we mention Fabtech's racing roots? The new line of Dirt Logic dampers not only reflects this heritage, it brings that heritage on board larger trucks that typically see only the most basic of shocks. Hefty diesel engines, such as the Duramax, need the added damping capacity that high-quality, large-volume shocks offer. It turns out that high-end shocks are just as called for on a heavy-duty, fullsize 4x4 as they are on a lightweight, high-speed prerunner. Yeah, they look cool driving around town, but get these shocks past the end of the pavement and you'll really notice a difference.