![New 210mm 3.91 Ratio Ring and Pinion with 14mm bolt holes for BMW](http://diffsonline.com/cdn/shop/products/dangillanDiffsonlineHR-51377644795521d30fbcca8d.jpg?v=1672213844&width=600)
New ring and pinion set for Motorsport applications.
When installed in E24M6, E28M5, M535, E34M5, or non M V8 cars which came with 12mm ring gear bolt holes in the carrier, the carrier will need to be drilled out to accommodate the larger bolts. You will also need a 14mm ring gear bolt kit.