Excellent product and a great web site. I had heard much about the venturi effect of race chamber type F——–r but it is hard to not see the advantage of a true straight through design. You can look through your muffler. A clear line of sight is easy to understand. Little or no muffler induced backpressure is the logical result. I was also impressed with the quality of workmanship evident in your muffler, the overall fit and finish of the welding, component assembly etc. It is also nice to see that your product is built in the United States. Keep up the good work.