Precision-Engineered 4JJ1 Main Bearing for Isuzu Engines

High-Strength Alloy Construction

Crafted from premium-grade alloy steel with advanced heat treatment for exceptional load-bearing capacity and fatigue resistance. Micro-polished surface finish ensures optimal oil retention and reduced friction.

Exact OEM Replacement (8973879640 / M4651A)

Manufactured to original Isuzu 4JJ1 engine specifications for seamless compatibility. Precision CNC machining guarantees perfect fitment with crankshaft journals.

Extended Service Life

Triple-layer overlay (lead-tin-copper) combined with reinforced backing material prevents premature wear in high-RPM applications. Ideal for commercial trucks, generators, and industrial equipment.

Performance-Tested Reliability

Lab-verified under extreme pressure (up to 10,000 psi) and temperature (-30°C to 150°C) conditions. Trusted by fleet operators for heavy-duty diesel applications.

Bulk Purchase Advantage

Direct-from-factory pricing with wholesale discounts for engine rebuilders and automotive distributors. Ships globally with OEM-compliant packaging.