Now available, known as the EVO4, the latest generation of World Champion 12 size IC Sirio engine has been launched! The Sirio 12 Evo4 features a 3 ports ABC Efra legal liner assy, a special STI type black crankshaft, also complying to the 2007/2008 Efra rules. Using some new material on the carburettor main needle, a new conrod, a new lightweight efficient cooling head, the Evo4 will offer the highest performance from a 1:10 IC 200mm Touring car, when coupled with the dedicated tuned-pipe line and the Kyosho 2D clutch set. Some new Ceramic rear bearings are available as option.