This service strengthens your factory axles by replacing key internal components with aerospace-grade materials and high-strength Chromoly upgrades

** We recommend sizing one size up as they shrink slightly after drying

Heat-treated and stress-relieved for endurance under high pressure

- 5150 High Performance Main Bearing Set

Each kit includes Radium Engineering's patented universal Fluid Lock® oil catch can with universal mounting bracket

Genuine BMW Rear Main Seal, BMW B48 3.0 This service strengthens your factoryThe rear main seal, also known as the rear crankshaft seal, is a crucial component in an engine. Genuine BMW Part Number: 11148664904 Purpose 1. Prevents Oil Leaks: The primary function of the rear main seal is to prevent engine oil from leaking out of the rear end of the crankshaft. It seals the gap between the crankshaft and the engine block or the transmission housing, ensuring that the oil remains within the engine. 2. Maintains Oil Pressure: By