Premium Fuel Filter FF5421 – Heavy-Duty Engine Protection
High-efficiency synthetic media traps 99% of contaminants for superior engine protection. Precision-molded silicone anti-drainback valve prevents dry starts. Heavy-duty steel casing resists corrosion in extreme temperatures ( -40°F to 300°F).
Direct OEM Replacement
Exact fit for 3978040 specifications—no modifications needed. Ideal for trucks, excavators, and construction equipment under harsh workloads.
Bulk Pricing Advantage
Global wholesale supplier with factory-direct pricing. Stock up for fleets or resale with guaranteed lowest B2B rates.
Engineered for Longevity
Multi-layered cellulose/glass blend media maximizes dirt-holding capacity. Nitrile gasket ensures leak-proof sealing even under high vibration.
Smart Compatibility
Fits Freightliner, Volvo, and Mack diesel engines (2007-2022 models). Includes ISO 4548-12 certification for tested performance.
Industrial-Grade Durability
CNC-machined threads and laser-welded seams prevent housing failures. Rated for 15,000-mile service intervals in severe dust/sand conditions.
Global Logistics Ready
Pre-packaged in OEM-style boxes for easy storage/shipping. Minimum order flexibility—pallet loads or single units shipped worldwide.
Performance You Can Trust
Lab-tested to exceed JIS D1611 standards. Reduces engine wear by 60% compared to aftermarket filters.