- Briggs & Stratton World Formula Exhaust Pipe and silencer kit.
 - Ideal for use in World Formula categories in Canada.
 - Exhaust pipe and silencer connects to the Briggs factory-spec exhaust header.
 - Kit includes (1) World Formula Exhaust Pipe (5447S), (1) Exhaust Silencer (P/N 4110), and two exhaust retainer springs.