10. The module of claim 9 wherein the front wall of the module is inclined backwardly to divert waves to move upwardly on the front wall. 11. The module of claim 10 which includes a panel diverter means extending across the top of the front wall of the module to divert waves outwardly...
During select engine and/or vehicle operating conditions, the controller 12 may adjust valve 24 to divert exhaust gas to conduit 314, and adjust valve 316 to divert exhaust gas to conduit 312 (specifically to passage 324). Additionally, the controller may close valves 332 and 326 but leave va...