Several companies sell (or did) sell those. 2 things to think about: 1)weight - they weight more than stock 2)they will bend if hit hard enough (I know everyone drives without hitting anything......... LOL) I have thought several times about using them and haven't. The one thing I have problems with is the stock knucles wear out pretty fast - the top and bottom screw holes (I have tried Losi and they are better) - have tried loc tite/superglue/ect. Does anybody have any have any ideas on a better solution????????