I must have missed a previous thread on this, but what does this do over and above the standard adjustment, is it not sufficient?
The part number you have is #67525 and was designed for the 00-05 is300. It does fit the 06-11 is 250/350 but the taper is not correct at the spindle and the a-arm ridge needed to be ground to permit the sliding action. . The SPC # 65730 is a brand new part and number which just came out last week, their site just posted it last week too. Go to SPC alignment.com. They charge $180 (US) each + shipping but you can get them both for $180(US) + free shipping in the US from IPA.com ( or something like that).