RLV's header pipe for the Briggs & Stratton LO206/Animal engine, sized to WKA and IKF spec: .932" ID x 18-7/8" on the short side. This is the first section of your exhaust, bolting to the engine's exhaust port and routing spent gases to the silencer — its dimensions are fixed by the rulebook so no one gains a power edge from a different pipe length or diameter. Mounting kit included.
*Uses EXF4104 Silencer & EXF9147 Clamp (Both sold separately).
