UMS 9-115cc EXHAUST PIPE ( X 10 QTY / PACK)

Replacement exhaust pipe for the UMS 9-115cc, the nine-cylinder 115cc four-stroke radial from UMS.

Function: it is the exhaust pipe, carrying burnt gas from a cylinder to the silencer or overboard.

The reason this ends up on an order: a cracked exhaust pipe leaks hot gas near the airframe and can fail completely; pipes also corrode from the inside over time. Supplied as a pack of 10, which is how these small parts are normally bought — you rarely need just one.

Fitting note: Check for cracks at the flange and the first bend, where thermal stress concentrates.