"Up for sale is a BMW E30 4.10 Limited Slip differential. The photo is a stock photo of a new 4.10 differntial. This is a medium case differential from a E30 M3. The unit has excellent lockup, recent redline gear lubricant change, and has no leaks. Mileage is unknown as it was not the stock differential in the car that I purchased. Will work in any E30 with minor changes between your stock unit. Good Luck and happy bidding!"