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 earlier B48 engines like on the F30 and F22 - most common on the early B48B/B46 but compare pictures of your oil pan as you could have the 11138580122 pan. The earlier pan ending in 694 has a more pronounced bulge near the oil level sensor. If your pan DOES NOT have the bulge you would want the STROM 99.00037 baffle instead.