Ultimate Racing M3X .21 off-road engine
Modelix Racing have introduced the new Ultimate Racing M3X square stroke 3.5cc nitro off-road engine. The O.S.-based power plant is of a 3-port design and was developed to produce maximum power while still offering exceptional tuneability and a linear power band. It comes with a high-quality steel rear bearing and a tungsten-balanced and silicone-filled crankshaft and is meant to be a more budget-friendly alternative to the M3T engine.
View a list of the specifications and another image here