G drum

The universal tail cover 101 has a triple expansion design, which increases horsepower and reduces torque loss at a larger expansion rate (the increase of horsepower is worse than the S drum, but the torque loss is almost zero).

Exhaust sound: the performance of the front and middle section of G drum is excellent, the low torque is slightly better than that of S drum, and the sound wave is lower than that of S drum.