Subaru STi R-180 LSD also called 'K' case long-nose R-180

Note the large 'K' cast into the top of the case. This denotes this Hitachi long-nose R-180 as a later unit w/ 115mm carrier (earlier R-180 were 110mm carrier). These are found in 2004 and newer Subaru STIs, with open versions found in the 1984-88 Nissan 200SX. As far as I know, K-case R-180s will all require 27T splined stub axles. Datsun 510 R-160s, Subaru R-160s, and 240z R-180s are all 25T splined stub axles, so they cannot easily be used here. R200s are 29T. More diff info from HybridZ here: http://tinyurl.com/2bj96xp