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I have a Gen 1, 2012, 6.2L. I just turned 271,400, other than normal maintenance I had one (1) lower ball joint that was too worn out to have the vehicle aligned. Since I had to replace one ball joint I knew the other ball joints would need replacing soon, so I had all four (4) control arms replaced (ball joints are an integral part of the control arm) and never realized how much difference and how much tighter and handling would be. No major engine work (e.g. cam chain) and the same exhaust system. It still runs fine and has no rust (Virginia, snows once every 4 or 5 years for 2 or 3 days). I am very satisfied with my Gen 1 and will hang on to it.