sthus 49cc 60cc 66cc 80cc High-Performance Racing Motorized Bicycle Gas Engine Motor Parts Muffler Expansion Chamber Exhaust Pipe - Chrome

Description

This expansion chamber used on a two-stroke cycle engine to enhance its power output by improving its volumetric efficiencyIt makes use of the energy left in the burnt exhaust exiting the cylinder to aid the filling of the cylinder for the next cycleIt is the two-stroke equivalent of the tuned pipes (or headers) used on four-stroke cycle enginesIt provides you with a boost in power and top speed