I have had my share of carbon monoxide in the cabin and have a few comments to offer. The cause of the Co2 was not just the flimsy clamps on the exhaust system but some considerable holes in the left side exhaust stack that happened just around the spot welding of the rear muff flange. There were five small holes that were burned through the alloy at every weld point where the welding slightly changed the yield of the metal. Metal fatigue did the rest. the exhaust fumes were entering the cabin heat stream and striaght into the cabin even with the heat turned off, the flap is not enough to keep out the stream of air and Co2. I have since added to my list of annual inspections, remove the heat muff and inspect the left stack. I suggest everybody do the same. It takes about 15 minutes if you have the four stupid little screws at the back. Personally, i have made a new one that wraps around and is held on by two starp clamps at each end around the flanges. It takes about 3 minutes to remove and inspect and maybe 5 minutes to re-install. In addition to that, I have found on E-bay a set of harley Davidson "aircraft style" exhaust clamps for about $15 that are about 1 1/4" wide and can be tightened plenty and these are much sturdier than the original clamps, they do not damage the pipe like the automotice clamps do, and are either chrome plated or stainless and look good to. they will require a field approval which when compared to the original clamps, is a no-brainer. I have pictures for thise who would like to see them. Alan Fairclough N87333 N94694
