Destined to be the 1:8 Offroad race engine of choice, the brand new ZR.21X Spec 2 engine’s refined and upgraded features include the new XTEC thermal-protected Works Team 14SV-2 carburetor made from a rigid aluminum alloy (ERGAL), with changeable 6.0mm and 7.0mm Venturi inserts for smoother, more tunable performance. For significantly better heat dissipation, the Spec.2’s blue cooling fins have been angled upward.