Tecnigas Silent Pro Exhaust for Modern Style QMB139 50cc Scooters

Tecnigas Silent Pro Exhaust for QMB139 50cc 4-Stroke Scooters.The Tecnigas Silent Pro exhaust improves torque over the stock exhaust, all while being quiet and maintaining a subtle look. Works on Kymco Super 9, Cobra, People, Like 50cc, SYM Horizontal AC, and contemporary styled Chinese 50cc scooters. Head Pipe Bolt Hole Spacing: 50mm Head Pipe Inner Diameter: 18.5mm  Includes Mounting Hardware and Instructional Booklet Removal of restrictions will give more power. Restrictions are located in the manifold flange and on the silencer.