Cleaning out the back of the shop the other day and found one new HRP 3136 front torrque arm relocation kit. If you have 05-06 cat m-series you need this. This kit fixes the track tensioning problem on the stock rear suspension so the suspension can cycle freely with out the track over tightening. It works so good cat incorporated this geometry into the 07 and 08 models. Free's up horse power and improves the ride a bunch. Brand new still in the package. $60. pm or email dan at jetjohnso@aol.com