Coming from ARC Nitro Italy is a new lightweight 2-speed gearbox for the ARC R8.0 and R8.1. Smaller in size than the original assembly the gearbox is also 10g lighter thanks to updated shapes and materials, it comes with harder springs and a reinforced 2nd gear bell. The results on the track are improved engine response especially in low RPM ranges, better acceleration and more precise gear shafts. In addition the gearbox is also more consistent over the course of a run, even in long mains, in high grip or high temperature conditions. The gearbox is a direct fit for both the R8.0 and R8.1.