Description Aussiespeed performance exhaust package for 4 stroke ohv Briggs & Stratton Animal & World Formula engines, Black painted finish header pipe part number AS0277P,  Aussiespeed AS0280P-32 long series 2 piece muffler includes 2 connecting springs to connect the header pipe to the muffler . This press bend header pipe suits engines that perform over a wide rev range it increases performance & torque & is designed for engines that use a wide rpm range. This is a full exhaust system including painted header pipe, painted long series muffler .