The latest O.S. Speed engine to surface is the Speed T1202 1/10th scale touring car engine. With significant updates have been made to the original T1201, the latest version features improved torque, a tungsten-weighted crankshaft with diamond-like coating and a lighter piston for better performance over the whole RPM range. A thinker cylinder flange transfers heat more efficiently to the low-profile cooling head and a low-profile carburettor restrictor enables quicker throttle response from low to top. On top of this the engine offers improved mileage.