Check this out guys. I was out in Joshua Tree, Cal. riding my wr and a guy comes up on a bike and says his friend just bought 426 and can't get it started.They had tried to jump start it by towing it behind a truck which led to bike and rider laying down and dragging across the lake bed together, ouch!!! So I told him I could help , followed him back to there camp spot. They had bought a brand new 2002 YZ 426 with a gyt-r exhaust the day before. So I hopped on it started it 2nd kick and made their day. Had a beer found out we lived pretty close to each other. I left that day and started thinking, hmmmm where is the factory exhaust? I called him up asked about the exhaust, he said the dealer didnt give it to him but he had to go back to take care of some paper work or something and he would get the exhaust and I could have it for...........FREE. Well I got it, slapped it on, and I am very pleased. Bike runs great!!!!!! Seems to have to be most noticeable mid throttle. I think. Need to ride it more.