I've just fitted these to my 2011 Raptor. The fronts and rears are different codes. On a '10-14 the fronts use the part # 639590 and the rears are # 639560. You'll need a 3/8" wrench for the fronts and a 7/16" for the rear My rears were ok but the fronts were showing signs of corrosion and were beginning to get difficult to loosen See above. The new nipples have a sealing paste on the threads and have a one way valve so brake bleeding becomes a one man job. Open nipple 1/4 turn press brake pedal 3 or 4 times per corner to bleed brakes thru with new fluid.