best 4 inch exhaust for 7.3 powerstroke
Many folks assume that all 4-inch exhausts are basically the same, but my hands-on testing proves otherwise. I’ve installed and driven with several options, paying close attention to flow, durability, and fit. The Upower 4″ Diesel Exhaust Muffler 7″x24″ Body, XS2772 stood out because of its fully welded stainless steel design and straight-through construction. It … Read more