O.S. Max 30VG(P) ES electric start, rear exhaust Monster Truck engine with pilot type crankshaft has a preinstalled E.S. Starter backplate is designed to use the Duratrax Kwik-Pit Super Start for the HPI Savage or the HPI Roto Starter System. Same mounting dimensions as .21 size engines making upgrading easier. Advanced Bi-Metallic Liner (ABL) cylinder liner construction. This process uses a double layer of plating material rather than one thick layer. This helps the metal bond to the cylinder and is more durable. Also, the plating process is more consistent, resulting in a more precise fit between piston and sleeve for better compression and longer life. Machined aluminum piston, 3-port cylinder liner and double bushed knife edge connecting rod. 21E single needle slide valve carburetor with insulated sleeve to prevent fuel vaporization. SG (pilot) type oversized crankshaft with rubber-sealed front bearing and oversized rear bearing to handle high torque loads. Two year limited warranty. This product includes O.S. Max 30VG(P) ES Electric Start Monster Truck Engine, illustrated manual, #8 glow plug, #203 air filter, two foam filters, two air filter O-rings and preinstalled E.S. Starter backplate.

Duratrax Kwik-Pit Super Start System or the HPI Savage Roto Starter System. Car blend nitromethane fuel with 10-30% nitromethane content, 20% nitro content recommended as starting point. Most of the fuels we carry meet or exceed the lubricant content required for optimum performance and maximum engine life. In the past, the conventional lubricant content used in fuel was 18%. But with new advanced technologies, fuels like Red Alert and O'Donnell for example, have a better quality of lubricants even though the percentages of lubricant content are lower. These high-tech lubricants provide exceptional cooling and protection.