Premium Crankshaft Bearing Set for Cummins Engines
Precision-engineered for durability with high-grade alloy steel, ensuring superior load distribution and reduced friction. Exact OEM replacement (4955521/3978818/820) with precise tolerances (+0.25/+0.50/+0.75) for seamless Cummins engine performance. Advanced anti-wear coating extends lifespan under extreme conditions—ideal for heavy-duty trucks, industrial machinery, and marine applications. Globally sourced materials, rigorously tested to meet ISO standards. Bulk pricing available—wholesale savings without compromising quality. Direct manufacturer supply guarantees authenticity and cost efficiency. Trusted by professional mechanics worldwide.