Subaru STi Pro-Level Axle/Hub kit is a complete rear system including both axles, hubs and ARP extended studs. The axles feature 28 spline 300m grade axle bars, 108mm Porsche-type inner cv with our billet bolt-on stub flanges for the R180 differential, and a billet outer CV Housing using a 300m spline section to the wheel hub. The hubs are made to accommodate the larger spline and have both wheel bolt patterns for 2004 (5×100) and 2005-2007 (5×114.3) STi that are also machined to accept the factory ABS rings. Rated up to 1200HP.