SKU: 21311427587
ring gear and pinion gear

ring gear and pinion gear BMW Motorsport 3.85 Ring and Pinion Gear Set – E46 M3 / E60 M5 / E63 M6

Sale price$26.47 Regular price$29.41
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Ships within 48 hours · Estimated delivery Jul 22 - Jul 27

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Description

ring gear and pinion gear BMW Motorsport 3.85 Ring and Pinion Gear Set – E46 M3 / E60 M5 / E63 M6Looking for a proven way to boost acceleration without adding stress to your BMWs engine or drivetrain? The BMW Motorsport 3. 85 Ring and Pinion Gear Set is one of the most effective performance upgrades available for the E46 M3, E60 M5, and E63 E64 M6. By switching to a shorter final drive ratio, like 3. 85: 1, you increase rear wheel torque by approximately 6%, delivering noticeably quicker acceleration and improved throttle response in every gear.

Looking for a proven way to boost acceleration without adding stress to your BMW’s engine or drivetrain? The BMW Motorsport 3.85 Ring and Pinion Gear Set is one of the most effective performance upgrades available for the E46 M3, E60 M5, and E63/E64 M6.

By switching to a shorter final drive ratio, like 3.85:1, you increase rear-wheel torque by approximately 6%, delivering noticeably quicker acceleration and improved throttle response in every gear. This upgrade is ideal for sharper launches, faster corner exits, and stronger pulls—without compromising drivetrain reliability.

Unlike engine modifications, a gear ratio upgrade transforms your BMW's driving dynamics without increasing heat, wear, or strain. The ring and pinion act as torque multipliers, helping your engine reach its power band sooner and making your car feel more powerful—especially in street or track conditions.

Key Benefits:

  • Improves Acceleration Without Adding Engine Stress
  • 6% Increase in Rear-Wheel Torque Output
  • Perfect for Street or Track-Driven BMWs
  • More Effective Use of Gearing in Corners and at Speed

Real-World Example – 2004 E46 M3 (6-Speed, 275/35-19 Tires):

  • 4th Gear @ 40 MPH:
    • 3.62 Ratio: ~2,250 RPM
    • 3.85 Ratio: ~2,350 RPM
  • 6th Gear @ 70 MPH Cruise:
    • 3.62 Ratio: ~2,650 RPM
    • 3.85 Ratio: ~2,800 RPM
  • 5th Gear Top Speed @ 8,000 RPM:
    • 3.62 Ratio: ~175 MPH
    • 3.85 Ratio: ~165 MPH

These changes demonstrate how a shorter final drive enhances acceleration while maintaining highway drivability.

Installation Notes:

This is a genuine BMW Motorsport ring and pinion set only. Installation requires professional setup inside your existing differential housing. BMW does not supply rebuild components (bearings, shims, etc.), so we recommend using a shop experienced in BMW differential service.

If your car has over 60,000 miles, consider a full differential rebuild.

Vehicle Fitment:

  • 2001–2006 BMW E46 M3
  • 2004–2010 BMW E60 M5
  • 2004–2011 BMW E63 / E64 M6

BMW Part Numbers:

  • 33108437888
  • 33-10-8-437-888
  • 33 10 8 437 888
  • 33.10.8.437.888
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 21311427587

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RN1322
Waukegan, US
★★★★★ 5
Beautiful set
Color: Silver, Size: Rechargeable
So far love this set. It was a gift for my boyfriend and he loves it. The look is perfect, and so far functions as expected. Also the charge has lasted for months so far.
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Reviewed in the United States on April 25, 2026
D
Verified Purchase
David MacEwen
Port Orchard, US
★★★★★ 5
Great product
Color: Silver, Size: Rechargeable
No more batteries dead when you need it most! Love them
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Reviewed in the United States on March 18, 2026
J
Verified Purchase
Jesse
Port Orchard, US
★★★★★ 5
Better than most
Color: Silver, Size: Rechargeable
Very awesome. Works better than expected. Very easy to use and refill when it runs out. Highly recommend!
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Reviewed in the United States on February 27, 2026
L
Verified Purchase
Lizette
Waukegan, US
★★★★★ 5
Very good quality
Color: Silver, Size: Rechargeable
There very nice. Battery is very durable.
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Reviewed in the United States on March 2, 2026
M
Verified Purchase
Michael
Louisville, US
★★★★★ 4
Good value for price. Get coarse large grained salt to grind or it comes out fast
Color: Silver, Size: Rechargeable, Color: Silver, Size: Rechargeable
Works good upon opening. Get coarse salt or it will come out fast.
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Reviewed in the United States on March 25, 2026

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