Product Description

- Outside back pressure design, may promote the slow-speed of revolution torsion, starts quickly, the hill climbing is powerful. The sound is low and deep, when *5 decibel about will not sacrifice the high speed the horsepower. But when its high speed will have the slight resonating sound, will not be obvious to a high speed horsepower promotion. The S drum is suitable generally for 3.0 below the displacement vehicle type.