Standard stock replacement part by the 'K' prefix, just expensive because Moog, who makes great parts. The one year warranty parts from China that only last 6 months have totally forced them to raise prices on the much better parts to be able to afford say lifetime warranty. That is hard on suspension part companies because of all the people who severely abuse their stuff to demand new part after new part. I saw people tear up suspension parts in 3-4 weeks commonly and back asking for more, maybe 4 times a year doing that. Even best of the best parts. Some drivers are utter butchers especially if 4WD.