So its a long story but I am looking to replace the rear brake caliper on my 07 wr450. There are quite a few on ebay for a pretty decent price but they are yz parts. The part numbers vary slightly (WR- 1C3-2580W-70-00 YZ- 1C3-2580W-51-00) for the entire assembly but all the individual brake components seam to have the same numbers (pistons, seal kit, etc). The only part that they dont show a part number for, which could be the reason they are different is the mount. Anyone have any additional info? Many thanks.