A method and system for rendering a set of computer-readable program instructions on a user device as executable or non-executable. A second NOx-trapping catalyzer unit is disposed on a downstream part of the exhaust passage. A reduced flow area section and a device for improved liquid spread may be used at the outlet of the downcomer. Convert these to circumferential distances for each revolution. The top and bottom saddles are movably positioned within the coupling element such that they can gradually reposition and self-align into a secure engagement with the stabilizer as the compression member provides the compressive force.