Motorsport Ring & Pinion Gear Set, 4.10 - E46 M3, E9X M3

23008437087

This part is listed by BMW as BMW part number 33108321899 (33-10-8-321-899) and is described as 4.10 Ring & Pinion Set for the 210mm rear differential, as found in many M cars. 

Looking to shorten your gearing for better mechanical advantage and acceleration on your E46 M3, E9X M3, or E85/E85 Z4 M? This authentic 4.10:1 Motorsport ring & pinion is what we use in any pro race car or street car build when there's a need for aggressively shorter gearing. 

This is a part that we buy directly from BMW Motorsport. It was originally designed by Motorsport engineers for competition use in a factory BMW racing program. As a part designed for competition use, it does not have a warranty. BMW Motorsport parts may sometimes be in short supply and orders are released at the discretion of BMW Motorsport. If a part is not in stock, contact us for the latest estimate on delivery time.

This can be used on a street, track, or race car. Be aware this shorter gearing does effectively reduce your theoretic top speed at red line (which generally isn't a problem at most tracks or driving situations). 

For full BMW fitment information or for assistance from one of our BMW experts, we recommend calling us at 877-639-9648.