Description Honda ohv gx160, gx200 6.5hp & 5.5hp Chinese copy 4 stroke Gokart engine performance header pipe part number AS0312B Aussiespeed AS0280B-32 long series 2 piece muffler includes 2 connecting springs to connect the header pipe to the muffler . This press bend header pipe exits along the rear bumper on most go karts & increases performance & torque across a very wide rpm range. The AussieSpeed Honda / Clone go kart engine header pipe has a fully welded spring coupler for easy fitment of AussieSpeed AS0280B-32 long muffler. This is a full exhaust system that includes header & 2 piece muffler & conecting springs. a muffler to chassis mount is not included in this package & needs to be purchased separately