I bought my truck because I met a guy that had 450,000m on his original Lb7 and the only thing he replaced was the injectors at 250,000m (aproximatly). He said he towes all over the county and considered buying a new truck but then said "why." My Lb7 is on its originals no smoke pulls strong and has 145,000m on it with no special mods to speak of. If they do go, there is no doubt the injector design is flawwed, but i still love my Lb7 for its "emissionless" design :happy2: