Description AussieSpeed 4 stroke short top mounted header pipe designed for Barstool racers, Rear engine go karts & off road buggies & mini bikes where a tight fitting sports exhaust is needed.The Aussiespeed header is supplied with a steel port liner this pipe makes good power on stock & mild modified engines. The header has a steel support that bolts to the front of the engine block that is a standard mounting point for Briggs & Stratton Animals Can be used on World Formula Engines but mount needs to be modified if using electric starter. The muffler can be purchased on its own or we have exhaust kits available also WORLDWIDE SHIPPING AVAILABLE