Pulverize the competition with this amazingly fast, durable and easy to adjust engine! Using the latest technology and construction techniques, this is the standard powerplant for the Firestorm stadium truck!Glow Plug: R5 (use HPI #1504) Displacement: 3.01ccBore: 16.8mmStroke: 13.6mmMaximum Horse Power: 2.2PS(2.17hp)/ 31,000rpm Maximum RPM: 32,000rpm Head Gasket: x3 0.2mmCarburetor: F2 Composite 6.5mmPlease note: This engine is an ideal upgrade for the MT2, to fit this engine in a MT2 you will reqiure engine mount 86000