See below:
The SIRIO XXX V is an engine developed for use in 1/10 scale On-Road competition racing and is the natural evolution of the previous model the SIRIO XXX. The new re-designed crankcase with increased dimensions and structural improvements, allows better use of the power available in the "high rpm area". The new caracteristics and production technologies, ensure the high standards of quality and performance. The use of the best materials and ceramic bearings, increase performance, durability and reliability.