RC Concept have added the MC5X to their X-line of nitro engines. Those engines include the new 2017 X-Line carburetor with a double bottom-end adjustment and the new 2017 DLC Coated Crankshaft (Diamond-Like Coating). The new X-Line carburetor will give you a smooth power band while the idle will be better and the top end increased.
The new DLC crankshaft will make your engine last forever: the crankshaft lifetime is multiple by 3 and the connecting rod lifetime by 2. Those engines are still coming with othe High Quality Ceramic rear bearing, the Swiss made front Bearing and the updated cooling head system. The engines are available now alone or in combo with the efra 2133 or efra 2099 pipes.