Patent ID: 6901753

Claim:
An expansion pipe for use with an engine, which includes: an elongate, curved tubular body formed from a first tubular section with open first and second ends, and a second section which has an open end and a closed end, the cross sectional area of the second section increasing from the closed end to a maximum area at a location which is between the open end and the closed end and then decreasing from the location towards the open end; and a first connecting component secured to the first end of the first section for attaching the elongate curved tubular body to an exhaust gas port of the engine, the second end of the first section and the open end of the second section being detachably engaged with each other and being axially rotatable, to a limited extent, relatively to each other, the elongate curved tubular body defining a first body part with a first curved longitudinally extending axis which lies in a first plane and a second body part with a second curved longitudinally extending axis which lies in a second plane which is displaced angularly relatively to the first plane; and a second connecting component, which defines an outlet from an interior of the elongate curved tubular body and which is positioned between the first end of the first section and the closed end of the second section, whereby a device, for treating exhaust gas leaving the body interior, is attachable to the elongate curved tubular body.