This is the Dynamite Mach 2 "Big Red" .28 nitro engine, with a Pull/Spin Start Combo and is intended for use in Monster Truck applications. Dynamite's Mach 2 "Big Red" .28 monster truck engine was engineered for superior torque and durability allowing you to unleash the full potential of your nitro monster truck. With features borrowed from the popular Dynamite Platinum series, "Big Red" is a force to be reckoned with. Not only does the engine boast a 13mm turbo ported crankshaft as well as an ABC 6 port piston and sleeve, it also stands out with its oversized aluminum cooling head with "Big Red" etched on the top of the head. Looking for an affordable, high performance engine for your nitro monster truck, look no further as Dynamite's "Big Red" leaves the competition in the dust.