Traxxas hard anodized teflon coated GTR shocks Revo’s GTR shocks can be upgraded for smoother, longer lasting performance with this fully assembled shock set. The hard-anodized, Teflon®-coated aluminum bodies provide the smoothest finish possible that’s extra tough for long wear. Titanium Nitride (TiN) coating on the shafts provides an incredibly smooth and durable finish. These shocks feature the same threaded shock bodies and spring pre-load adjusters, volume compensating rubber diaphragms, and low-friction X-ring seals as standard GTR shocks. The kit includes 4 fully assembled shocks without springs.