get the tein ss-p its about 200 more but
its compatible to the EDFC which allows
you to adjust your damper from inside yout car
i read that the tein edfc has issues with installation. someone had to make modifications to make it fit. so, unless you're decent at fabrications the edfc may be a problem.
also, doesn't the tanabe have easier rear damper adjustability than the tein (which you have to get to by removing the trunk plastics)?