Someone asked for this some time back and I am just posting the sound of my truck with the Dynomax Ultraflo X-Muffler, I recorded this with my Treo 680 so the sound is not that crisp, but you'll get the picture. Three seperate files.
Cheers!
File One
File Two
File Three
When you get to the rapishare site just scroll down, click on the "FREE" button in the free column, on the second page scroll down and enter the large bold text in the box and the file will download automatically.
Let me know what you think!