ATRACYPART LF3970 Oil Filter for Cummins ISB/QSB 5.9L & 6.7L — 2-Pack, High-Efficiency Media

ATRACYPART LF3970 is a heavy-duty replacement oil filter engineered to protect Cummins ISB and QSB 5.9L/6.7L diesel engines by capturing fine contaminants while maintaining steady oil flow.

Keep your diesel engine running reliably with a filter built for demanding environments. The LF3970 combines high-efficiency filter media, corrosion-resistant metal housing, and precision sealing to help reduce wear and preserve oil quality. Sold as a convenient 2-pack, this unit directly replaces several common OE numbers so you can match compatibility quickly and confidently.

How does the LF3970 improve engine protection?

The LF3970 uses multi-layer filtration media designed to trap small particles without overly restricting circulation. That balance helps maintain oil pressure and ensures moving parts receive proper lubrication under load.

• High-performance media captures fine contaminants
• Optimized flow characteristics preserve oil pressure
• Reduces abrasive wear on bearings and rings
• Helps extend drain intervals when used with proper oil

What makes its construction durable for diesel use?

This oil filter features a reinforced metal housing treated against corrosion and designed to withstand elevated temperatures and pressures common in heavy-duty diesel applications. Robust build quality reduces the chance of deformation or failure during extended service.

• Stamped metal canister resists rust and impact
• Reinforced end caps and center tube for structural strength
• High-temperature adhesive bonds for media integrity
• Designed for harsh operating environments and vibration

Which engines and part numbers does LF3970 replace?

The LF3970 is designed for Cummins ISB and QSB 5.9L and 6.7L diesel engines and cross-references common OE numbers for straightforward replacement. Always verify fitment against your engine’s service manual or existing part number before installation.

• Compatible with Cummins ISB and QSB 5.9L/6.7L engines
• Replaces: P550428, P551019, 3937736, 3937144, B7177
• Sold as a 2-pack for scheduled maintenance
• Check original part number to confirm compatibility

How easy is installation and routine maintenance?

Installation follows standard spin-on filter procedures and requires no special tools beyond a filter wrench. The LF3970’s reliable sealing design helps ensure leak-free service when installed to the manufacturer’s torque recommendations.

• Spin-on cartridge fits standard Cummins filter mounts
• High-quality gasket helps prevent post-installation leaks
• Replace during oil change intervals per engine guidelines
• Dispose of used filters responsibly according to local rules

Who is this for: Mechanic shops, fleet operators, and owner-operators running Cummins ISB or QSB 5.9L and 6.7L diesel engines who need a dependable replacement oil filter that matches common OEM numbers. If you manage heavy equipment, commercial vehicles, or performance diesel applications and want a robust filtration option supplied in a 2-pack for scheduled maintenance, the ATRACYPART LF3970 is designed to meet those needs. For fitment questions or assistance, ATRACYPART customer support is available to help confirm the correct part for your engine.