188mm (Standard) BMW Refurbished Ring + Pinion Gear Set, Polished + Cryogenically Treated, 3.91 Ratio
Thayer Motorsports now offers refurbished ring and pinion sets for your custom differential build!
Starting with only numbers matching ring and pinion sets, we professionally clean and inspect each component. The sets that pass inspection are then cryogenically treated. Finally each set is finished by chemical and mechanical polishing.
The end result is a gear set with higher than factory strength with less friction losses! This product truly reflects performance.
Changing the ratio of your differential is a professional level project. Thayer Motorsports offers this as an in-house service. Please contact us for installation services.
$ 1,295.00 $ 1,159.99