I got these pages at a swap meet years ago. It covers (most) of an aftermarket exhaust system shoot out between Dunstall, Triple A, Action Fours, Racecrafters and Jardine. Its missing the last page, but it does have the comparison chart with all the important numbers. Hopefully the images are big enough for you to read the text. Click the image to see it way bigger. The Jardine was the fastest, but also the loudest, Racecrafters came in second in both noise and speed. Triple A however came in third in the speed measures, but was the quietest except for the stock Honda system.