How a take a Flowmaster 50 HD and convert it to a Straight Through (absorption) muffler using Stainless Steel Wool and Ceramic Fiber commonly used in straight-through mufflers. This video will show you how to build your own muffler. I've built mufflers in the past, for an 82 Chevy Truck with a 6.2 diesel. I made stacks through the box for that one and built a complete exhaust system including muffler for a GMC Sierra with a 6.5 diesel turbo. This is a great Cambered vs Straight Through Muffler test.

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