Tried Easy Off on the Sporty's mufflers this weekend. It works, BUT, be sure you have good aim, apply it only where you need it, and if it gets on anything else......GET IT OFF NOW!!!! It'll leave S100 Total Cycle Cleaner looking spots if you don't. Also, be sure to rinse very well......even more so than you would if you use the S100 stuff.......which I'd NEVER recommend. I wouldn't recommend the Easy Off method unless you have something really nasty to clean off, and even then, extreme caution is advised. The stuff is caustic. Be careful.