No, you don't have to have a ToyTec lift to use the spacer. I only have 5100s in the front. I haven't heard of anything handmade. If you already have the 5100s installed, all you have to do is drop the driver side coilover down just enough to drop this spacer on top of the coilover assembly. Viola!
And was there something about 1/4" spacer for 1/2" of adjustment?
Or am I full of crap on that one, too?