Badass upgrades! OS Giken is a sweet diff. I'm in full agreement that VAC is the place to go for serious upgrades. They're a full machine shop and a race shop.
I still have the stock diff bushings and I'm nearly certain they are the reason my car's rear end can still steer the car slightly under full acceleration. Maybe I'll pull the trigger on those in the future.
Slightly off topic but what kind of exhaust is that?
2011 BMW E92 335i, 6MT, Le Mans blue - Quaife LSD, JRZ RS Pro, JRZ camber plates, Eibach ERS, full M3 susp, custom toe arms, Powergrid end-links, SS brake lines, brake ducting, Michelin PSS, UUC SSK, ETS FMIC, ER CP, Perf. Exhaust, VAC RSIK, Sparcos; work by VAC Motorsports in Philadelphia