The Super Tigre GS-40 is one of the most popular engines in use today and boasts new timing and a 10% power increase over the previous S-40K model. The engine is of Ring construction and features: precision ball bearings at the front and rear of the crankshaft for smooth operation and long life; Schnuerle porting for increased power; lightweight cast head which improves power to weight ratio; expanded volume muffler which can be bolted on the engine at virtually any angle.