You, too, can use a household appliance to remove dents from your exhaust header pipes. And it's free. Simply remove the pipe, fill it with water, stick it in the freezer, leave it while you watch the game or have a brew (or both), remove when it's good and frozen, and thaw. Easy. If the dent doesn't come all the way out the first time, repeat the process after flushing out the original ice. Click the thumbnails attached to see a titanium WR450 header pipe before treatment, in the freezer, after the first treatment, and after the second. Pretty amazing, huh?