Here is the start of the exhaust silencer, It will be constructed from the parts pictured here, an 8" stainless steel pipe approx 2mts long with a 4" pipe up the middle of it, with a gap in the middle, This pipe will be capped at the ends and drilled to form a baffle, its a simple design but works really well. Then finally it is all wrapped in a stainless steel perforated heat shield. Best of all its a lifetime job.