Pipe Exhaust (Outlet)Specifications Item Description The Pipe Exhaust (Outlet) is a replacement exhaust component for the Kubota Engine assembly found in JLG 450AJ and 450A aerial work platforms (non Arctic configurations). This outlet pipe directs exhaust gases away from the engine and is a critical part of the engine's exhaust system. One unit is required per machine. Skyworks is an authorized reseller of JLG parts.