Taiwanese engine manufacturer STS have unveiled more additions to their already extensive range of engines. First up is the new S12XS, 2.1 cc touring car motor that has a 12mm crankshaft with turbo scoop, 5 port tear dropped ABC liner and is supplied with a turbo plug. The S12XS is also available as a 3 port IFMAR legal version. Also for on road is the new 3.5cc S21R motor that has a 14mm balanced crankshaft with turbo scoop, 5 port ABC liner, carburettor with interchangeable venturis and is also supplied with a turbo plug. Finally is the S21T buggy engine which is exactly the same as the on road motor but has a larger cooling head as is normal with off road motors.