I would say that they should hold up pretty well but it's kind of early to tell for sure. I believe that they just started using them on the Max for '07. I've got about 35 K on mine and so far so good. As far as adding power, they put it behind the new model with 290 horse. Not sure if they beefed it up though. Personally, I am not one for mods and this car really doesn't need any. It's pretty darn quick and powerful as it is. Honestly, I think the 255 horse rating they give it is underrated. Any time you add more power you take a risk in things not holding up as intended.