Ningjin Hengtong Muffler Co. , Ltd. , Which original name is Ningjin Hengtong Muffler Factory. They are specialized in manufacturing auto exhaust pipe, Muffler and 3- Way catalytic converter. They have abundant strength on quality assurance ability and passed ISO9001: 2000 certification. The company is well equiped with three production line, Which composed by CNC seam Yaokou Machine, CNC Bending Machine, End Forming Machine, Sealing Machine, Automatic welding machine. Annual Capability is RMB 3 Million Sets.