Dynamic weight with aluminium radio plate for XRAY NT1 & RX8
The engine got Pole Position in the worlds GT Class in Miami .
Availabe in 14.5mm crankshaft and 14.0mm
5 port modified sport engine for club racers
World Champion Engine from Os Speed!
Os Speed R21 GT 2019 , Based on 1/8 on road .21 engine , specially tuned for GT class with more torque !