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.






























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4jj1 main bearing for isuzu 4jj1 engine crankshaft bearing 8973879640 m4651a
$20$31.74-36.99%
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