James I saw two Cyclone vacs at a customer's farm shop yesterday, they were both put up for the winter,high up on a pallet rack in the shop..anyway best I could tell,the vacs use a B+S engine, looking at the tongue,the vac is on the left,then the metal heat shield(which redirects engine cooling air as well)then the engine..the exhaust comes out the front of the engine,with a curved pipe on the outside front of the muffler to direct exhaust flow down and away from the front of the engine.
