Weld a 5-inch x 9-inch elliptical muffler, using a 2.50-inch free flow perforated straight core, wrapped in stainless steel mesh, and double 24 gauge circular resonance. Limited lifetime warranty, in fact, the exhaust head section was originally designed to cope with the environmental protection era. In order to solve environmental problems, manufacturers first need to reduce the pollution level of exhaust gas when starting the engine, so fuel supply, ignition, and intake all need to be coordinated. To control this accuracy, oxygen sensors must be installed before and after the catalyst to monitor the air-fuel ratio; At the same time, a rear oxygen sensor is needed to detect changes in residual oxygen and estimate whether to increase or decrease fuel supply and intake based on the amount of oxygen consumed by the catalyst. Therefore, the three element head section is an important part of modifying the exhaust pipe.
