Brand new 150cc engine with INTERNAL reverse gear. It will physically bolt in place of a standard GY6 engine, however few things will likely need to be modified depending on your buggy. Please read this article for more detailed information.

Engine Spec:
Bore x Stroke: 57.4mm x 57.8mm
Displacement: 149.6cc
Peak Power: 10.05 HP @ 7500rpm
Peak Torque: 7.6 FT/LBS @ 6500rpm