From what I heard last you'll only find them used. However, BMR has a pinion brace and spectre works has the rear cradle bushings.
I chose to get the G-force econo axle myself, but my car came with a pinion brace and "supplemental" bushings from a TSB fix some time in the past. My wheel hop isn't bad and I think the axle shaft should make it almost non-existent considering my moderate driving habits.
I dont know too much about the kars kit, but I bought a gforce axle and it greatly reduced wheel hop. Only time I get wheel hop is in the rain, but other than that it is great. If wheel hop is what you are trying to get rid of, I would get the gforce axle.
just my 2 cents
__________________ 2006 CTS-V, LS7 clutch, azn2dmax's custom short shifter, GTO shift ****, Cags, K&N intake tube with stock box, Dynomax race bullet mufflers. G-Force driver side axle, Brakemotive Slotted and Drilled rotors, steel braided brake lines.
2006 ZX-10r full akrapovic exhaust, 1/5 throttle, -1 front sprocket stolen.
2007 CTS-V, lightly modded wrecked
Thanks for the replies. My next question would be in regards to the BMR Pinion support, the current bushing is bad. Should I have that replaced in conjunction with the BMR support or is the BMR support enough?