BMW 210mm Ring & Pinion 3.91 Motorsport (E46 E60 E90 M3/M5)
Motorsport Crown and Pinion 3.91 to suit E36/E46 M3, E28/E34 M5, V8, V12 including E34 540i, 740i, 750i, 850i etc. These new Motorsport gears use M14 bolts. For gears which use 12mm bolts see the 210mm 3.91 M12 ring and pinion. The cheaper M12 gears are almost always on the shelf for fast delivery.
These are the perfect upgrade for the E36 M3 3.2L and E46 M3. For even more torque the 4.10 ring and pinion is a great option.
Why not add an LSD while you're changing the gear ratio? It's a good time to install and LSD while you're there. If installing locally, you will also need a differential rebuild kit. If your LSD is worn beyond acceptable limits, you can also install an LSD rebuild kit.
We can rebuild your diff for you. We offer reasonable return postage rates via Couriers Please. Contact us for a fast quote.
Need help selecting the best ratio for your car. Look no further. Selecting the Right Ratio.
These must be installed either by me or by a professional and competent diff builder. See our Recommended Diff Builders page for more info.