I odered my tower muffler today, it should be here (australia) in 10 to 30 days. Looking forward to trying it out. Cost $27 US including postage which is about $36 AUS still a very cheap muffler. Most tuned pipes here sell for around $100 AUS, so if the only thing that out performs it is a tuned pipe I think I got a good deal. Only time will tell.