Sorry for delayed reply. Can't send a pic of the baffle I sold both tractors this week. My baffle was a flat piece of metal about 4X6 inches with tabs I welded on to fit extra holes in the compressor. I don't recall the 4040 series but didn't they have external mufflers? If so it may be moot...
I have two 2755 tractors one with the Delco and one later model with the Nippondenso compressor. The Denso is somewhat better but not much. I believe the problem is poor design. The compressor is mounted too close to the muffler. Further the compressor is mounted high under the hood out of the...