K&N Premium Oil Filter HP-4003 – 20,000 Mile Engine Protection with Wrench-Off Nut (Select RAM/DODGE/STERLING)

K&N HP-4003 Premium Oil Filter: Engine Protection Built for Extended Service

Meet the K&N HP-4003 premium oil filter, engineered to deliver strong filtration and robust protection for your engine across extended service intervals. The heavy-duty canister is designed to endure the vibrations and heat of demanding driving, while a one-inch welded hex nut enables quick, tool-assisted removal. This filter is crafted to align with service intervals commonly recommended by vehicle manufacturers and is protected by the K&N 1-Year Limited Warranty, offering reassurance for routine maintenance.

Beyond the basics, the HP-4003 emphasizes filtration capacity with its pleated synthetic-blend media, engineered to help minimize contaminants before they reach critical engine components. Laboratory testing supports its capacity and burst strength, providing confidence for long trips, fleet use, and daily heavy-duty operation. While experiences vary by vehicle, the system is designed to support healthier oil flow and potentially fewer maintenance interruptions when used with compatible engines.

Key Benefits

• HIGH FLOW RATES: Designed to provide exceptional flow rates and a consistent flow of oil to your engine
• VERSATILE COMPATIBILITY: Designed to operate with all synthetic, conventional, and blended motor oils
• PROTECT YOUR ENGINE: Pleated synthetic-blend filtration media removes most harmful contaminants
• EXTENSIVELY TESTED: Laboratory tested to ensure excellent capacity and burst strength
• EASY TO REMOVE: Fast and easy Wrench-Off removal

Real-World Use Scenarios

• Extended service intervals in highway driving or fleet operations
• Maintenance in spaces with limited room to maneuver, thanks to the wrench-off nut
• Daily heavy-duty use where consistent oil flow and reliable filtration matter

Compatibility and Warranty

Compatible with select RAM, Dodge, Freightliner, Sterling models and other heavy-duty applications. For exact fitment, please review the full list in the product description. The HP-4003 is backed by a 1-year limited warranty from K&N, providing one more layer of confidence for your maintenance schedule.