I bought it after a very vague research on the internet. I wanted something to get rid of the droning when cruising around 2000-2500 rpm. Well, with a little trimming and a tight fit, some welds and a coat of paint, this solved my problem. I love it and it saved me from buying a new exhaust or going numb. I want to go back to that review and say that I bought it for about $10 or so not that long ago. Now the price of a few good reviews goes from $10 to almost $20? It makes no sense. I think it's a @&$$&&$ scam to get your product on the shelf fast! So it worked, I would say take a smaller diameter tube, weld a smaller fin on it, like metal, and make your own. This seems logical as it could go back up in price because someone else might buy it.