In this category you will find all the complete mufflers we can have for your HONDA 4 strokes like the CRF,... We will propose you mufflers of the brand ART, YOSHIMURA, PRO CIRCUIT, CRD, SCORPION,... These exhaust lines include the collector as well as its silencer. A muffler is less important on a 4 stroke engine than on a 2 stroke engine. But often on the original machines they are not perfectly studied. A complete exhaust system allows you to save weight and performance on your engine. Often easy to install giving a racing look to the motocross bike.