King MB7039AM AM-Series Main Bearings for 1982-2010 BMW M20/M50/S50/S52

Regular price: $129.95
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Sale price: $129.95

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In Stock: 32

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Product Specification:

SKU:KINGMB7039AM

MPN: MB7039AM

UPC: 611500355301

Weight: 1.2 lb

Inventory: 32

Type: Bearings

Vehicle Fitment

1982-2010 BMW 3-Series/5-Series/X3/Z3/Z4 M20/M50/M52/S50/S52 2.0L-3.2L I6 (E30/E34/E36/E46/E85/E89/E83)
2001-2006 BMW M3 S54 3.2L I6 (E46)

Features

AM-Series standard aluminum tri-metal construction
SAE-783 equivalent material for reliable low-to-medium loads
180° full-length oil groove for consistent lubrication
Precision-machined bearing surfaces for OEM fitment
Steel-backed design resists deformation under torque
Standard (STD) bore and journal size - no machining required
Compatible with stock and lightly modified engines
Lifetime replacement warranty via select sellers

Specifications

Crankshaft journal diameter: 59.972-59.990 mm
Block housing bore: 65.001-65.019 mm
Bearing width (length): 25.039 mm
Wall thickness: 2.494 mm
Material: aluminum-backed tri-metal, steel support
Undersize: STD (no extra clearance)
Oil groove: full 180°
Flange size: FL STD

Included Components

7x main bearing pairs (STD size)

Product Description

The King MB7039AM AM-Series main bearing kit delivers OEM-level durability and reliability for BMW I6 engines spanning decades, from the classic E30 3-Series to the high-output E46 M3. Constructed with precise aluminum-based tri-metal layers - steel backing and SAE-783 equivalent alloy - these bearings are designed to withstand daily driving and moderate performance demands without requiring machining or modification.

Featuring a full 180° oil groove and standard STD sizing, this kit ensures consistent oil flow and drop-in fitment. Ideal for rebuilds or refreshes of M20, M50, M52, S50, and S52 engines, including the S54 in the E46 M3. Backed by King's lifetime replacement at participating dealers, these bearings deliver quality you can rely on. Installation by a professional machinist and verification of oil clearance is recommended.