RE: front one way
If that's what your talking about then you mean the Diff gears in the diff housing. You want to know if they make a posi locked rear end or gear box? No they do not, but you can lock the diffs easy enough with clay, silly puddy, JB Weld (can not be removed) and etc... THat will lock your diff and give you posi traction for drifting if that's what you want to do. Also the HPI Posi diff should work.