In this new era, noise pollution is very high. The one reason for this noise pollution is noise or sound which is generated by the exhaust system of the motorbike. So, it is necessary to reduce the noise from the motorbike's exhaust. In this, reverse engineering of the original silencer are done and analyzed, then three modification model of the silencer are prepared and analyzed, and as per the results, one modified silencer is selected forward for manufacturing. After the fabrication of the silencer, two tests are conducted. First, the test is conducted with the original silencer and then...