If anyone is still looking for a 4 bolt, 27 Spline Subaru R180 diff stubs, FutoFab offers them.
We assumed the Wolf Creek Racing stock when it's owner passed in 2015. Since that time we have changed our manufacturing process using forgings rather than machining from billet stock. We feel forgings offer better quality.
FutoFab's forged STi stub axles are distinctive, having a round flange. Price is $550/pair +S&H.
link - FutoFab STi Diff Stubs
We offer multiple CV axle and stub axle options for the S30 Z Cars.
Link - FutoFab's Driveline Page
Dave Patten, Owner
FutoFab LLC
199 Stark Hwy S
Dunbarton, NH 03046
(603) 774-6964
email - Dave@FutoFab.com
website - FutoFab.com