Oil pan baffle to prevent low oil pressure under long braking events for cars being road raced. Tested extensively under extreme conditions on our B46 race cars in many variants.
 
Generally fits later model B48D engines like on the G20 330i but we have seen engines come with either pan. The earlier pan ending in 694 has a more pronounced bulge near the oil level sensor. In that case you would want the STROM 99.00038 baffle instead.