After building an exhaust system for my truck the "drone" sound was unbearable. I had some exhaust heat wrap laying around so figured I would try this out. The idea is to sound deadon the muffler which seems to act like a subwoofer. This is just an empty can not an actual muffler. I did end up replacing with an actual infilled muffler. This little project made it possible to drive my truck without getting a headache. Worked real well.

Amazon link
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