All I know for a fact is the thrust arms, because I have the shimmy. Steering is tight, though I do get an occasional thunk when going over bumps with the steering near lock. Really what I'm getting at is, I know what CAN be replaced, but what SHOULD be replaced? The Groton package is upper and lower thrust arms, tie rods, sway bar end links, and an idler arm. Is all this stuff probably shot at my mileage? I want to do this once, and don't have any reciepts for replacement, so I assume it's original. I just don't want to replace stuff that doesn't really wear out. Also, is there anything else that should be done while I have it apart? I already plan on either replacing the Bilsteins or having them rebuilt, because they have 80k on them.