I've been running around on this Keep Slant lift kit from Japan for several months now and thought I'd give my take on them despite not being all that common. They have an excellent design for grease able shackles and are almost semi parabolic with what looks like teflon spacers between the leafs. They ride very well, come with full military style wraps, have decent articulation and carry quite a load. The stance is very level with a reasonable lift. I'm impressed and wouldn't hesitate to pick up a set if they were more available in North America.
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