I just got off the phone with Energy Suspension.

They said that they made the bushings just for Spencer Low Racing for the front diff drop kit.

SLR is the ONLY company that machines all of the metal components for it.

Energy suspension only made the bushings, and you can't use just the bushings with the other parts.

So anyone that was thinking about making their own diff drop kit,although it may be possible, probably not easily done.
You cant order the Energy suspension bushings through anyone but SLR, and you can't get the metal pieces from anyone but SLR.

I hope that wasnt too confusing..