King MB5283HP HP Alecular Main Bearing Set STD for Ford 4.6L DOHC V8 Alum Block

Vehicle Fitment

• 1993-1998 Lincoln Mark VIII / Mark VIII LSC (4.6L DOHC 32V - aluminum block)
• 1995-2002 Lincoln Continental (4.6L DOHC 32V - aluminum block, FWD)
• 1996-2001 Ford Mustang SVT Cobra (4.6L DOHC 32V - aluminum Teksid/WAP block)
• 2003-2004 Ford Mustang Mach 1 (4.6L DOHC 32V - aluminum block)
• 2003-2004 Mercury Marauder (4.6L DOHC 32V - aluminum block)
• 2003-2005 Lincoln Aviator (4.6L DOHC 32V - aluminum block)
• All other Ford/Lincoln/Mercury applications equipped with the 4.6L DOHC 32V aluminum block

Fitment Notes

• Aluminum block applications only - fits Teksid, WAP (Windsor Aluminum Plant), and current production aluminum 4.6L blocks; does not fit iron block 4.6L engines
• DOHC (32-valve, 4-valve per cylinder) engines only - not for 2-valve SOHC or 3-valve SOHC 4.6L variants
• Standard size (STD) - verify crankshaft main journal diameter before ordering
• Set includes 5 pairs (10 individual bearing shells) - one complete main bearing set
• Note: 2003-2004 Ford Mustang SVT Cobra uses a cast iron block and is not compatible with this bearing set
• Professional engine builder or machinist installation required

Features

• HP-Series Alecular™ bi-metal composite structure - harder than conventional Babbitt overlay, designed to resist extrusion and material migration under high loads for short duration
• Ideal for drag racing, street/strip, and performance applications where the Babbitt overlay of a tri-metal bearing is susceptible to extrusion under peak load
• Superior embeddability and compatibility compared to harder race materials - handles contamination without damaging crank journals
• Greater eccentricity geometry for improved oil film distribution and superior oiling at high RPM
• Large chamfered oil holes ensure adequate oil supply across the full journal surface
• Chamfered surface profile accommodates large-radius crankshaft journal fillets common in performance and aftermarket cranks
• Outperforms industry standard wall thickness tolerance for shell-to-shell consistency
• Suitable for blown, turbocharged, nitrous-assisted, and alcohol-fueled performance builds

Specifications

• Part Type: Main Bearing Set (5 Pairs / 10 Bearings)
• Engine Compatibility: Ford 4.6L DOHC V8 - Aluminum Block Only
• Bearing Series: HP (Alecular Bi-Metal - Silicon Aluminum)
• Material: Alecular™ Silicon Aluminum Bi-Metal (SAE-794 equivalent structure)
• Size: Standard (STD)
• Bearing Width: .8941" / .7205" / .7559"
• Standard Thickness: .0962"
• Thrust Bearing Style: Captured
• Application: Street/Strip, Drag Race, Forced Induction, Nitrous, Alcohol

Included Components

• 5x Pairs of HP-Series Alecular main bearings (10 individual half-shells)

Product Description

The King MB5283HP is an HP-Series Alecular bi-metal main bearing set in standard size for the Ford 4.6L DOHC V8 with aluminum block - covering applications including the Lincoln Mark VIII, Lincoln Continental, Ford Mustang SVT Cobra (aluminum block variants), Ford Mustang Mach 1, Mercury Marauder, and Lincoln Aviator. The HP Series uses King's Alecular™ silicon aluminum bi-metal composite, which produces a bearing surface harder than conventional Babbitt overlays without sacrificing embeddability. This makes it the preferred choice when a tri-metal bearing's Babbitt overlay is at risk of extrusion or migration under high peak loads - as commonly encountered in drag racing, supercharged, turbocharged, nitrous, and alcohol-fueled applications.

Unlike tri-metal bearings, the HP-Series Alecular structure tolerates high loads for short durations while maintaining strong compatibility with both factory and aftermarket nodular cast iron crankshafts. King's geometry engineering on the HP Series includes greater eccentricity for improved oil film distribution, large chamfered oil holes for consistent supply across the journal, and chamfered surface profiles to accommodate large-radius crank fillets. These bearings are specifically designed for aluminum block 4.6L DOHC engines only - verify your block material and crankshaft journal dimensions before ordering. Professional installation is required.