I have a chance to get a used set of jaws pipes with stingers for my sled. Looking for reviews from people who ride them. Jaws website states they are not for below 2500 ft I am live at 2200, does yhis matter to much. What kind of clutching and jetting would I have to do. The deal is right guy wants to trade for my stock exhaust.. Should I do this or stay away... Need opinion's asap....Thanks