Description:

(Discontinued) 

O.S.SPEED's off-road racing engine has evolved further, and the fourth generation of the B21 series, the B2104, has been designed to provide the power to take advantage of the toughest off-road racing situations and to deliver steady performance in any situation. It has evolved into an off-road engine that is perfectly synchronized to the movements of your fingertips, from idling to the maximum rpm range. With O.S.SPEED's technical know-how condensed into its entire body, it will once again continue to create a legend in the off-road racing scene.