I have always wondered if these made a difference in the way the bike would run. Without a doubt, they really do. My KTM 2stroke has always run fine as the jetting is set correctly for the area and temperatures I ride in. Yet it has always dripped some spooge from the exhaust, which bothered me a lot. After installing the iBooster (a proceedure that takes about 10 minutes), no more spooge whatsoever. Besides that, the bike starts first kick almost every time, even after crashing, also the power feels stronger off the botom, and I get more miles per tank of gas. Likewise, the smoke that is typical at startup is reduced significantly and the packing in the silencer lasts much much longer as it doesn't get saturated with oil like before. Over the many years that I've been riding I have never found a product that even comes close to doing so many positive things for the dollars spent. If you ride a 2stroke and put an iBooster on it I promise you will not be disappointed.