3.91 Final Drive Differential Upgrade Kit (M5/6 SMG3)

3.91 Final Drive Differential Upgrade Kit (M5/6 SMG3)

Specifications:

Sport upgrade ideal for the M5/6 V10 SMG3:
- Increase torque to the wheels by +/- 8%
- No tuning required to retain SMG3 downshift program.
- Top gear RPM at 70 mph: 2870 RPM (+243 RPM over original)
- Top speed in 7th gear: 191 mph / 307 kph (-16.1mph / 25.9 kph less than original based on 8,250 rev limit)
Complete kit includes:
- Genuine BMW Motorsport 210mm 3.91 M14 gear and pinion.
- Genuine BMW seals, gaskets and o-rings.
- Genuine BMW crush sleeve and washer.
- OEM quality tapered roller and/or ball bearings.
- Shims kit (0.1mm increments from 1 to 2mm)
- Note: not all products in the kit are pictured.
Model year notes: early production M5/6 differential uses different gear and pinion bearings.

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