CNC machined 6061-T6 billet aluminum Incorporates motor mount from Axial AXI31377 and spur gear cover backing plate from Axial AXI31378 into one assembly Aluminum construction and heat sinks help keep motor running cooler, longer Anodized black with Hot Racing logo and secondary processed machined edges for outstanding looks NOTE: NOT compatible with Hot Racing SCXT1802 Will NOT work with vehicles equipped with the RTR transmission