K&N HP-4003 Engine Oil Filter

K&N HP-4003 Oil Filter Overview

The K&N HP-4003 oil filter is a spin-on engine oil filter built for Ram and Dodge heavy-duty truck applications that call for a 1 in-16UN-2B thread. It uses high flow premium media and a Viton rubber gasket to support consistent oil flow and dependable sealing in demanding service.

Compatible With 1989-2024 Ram 2500, Ram 3500, Dodge Ram 2500, Dodge Ram 3500, Dodge D250, Dodge D350, Dodge W250, and Dodge W350 applications listed below.

Key Features

• High Flow Premium Media for oil filtration
• Spin-on design with 1 in-16UN-2B thread specification
• One-inch welded hex removal nut for easier filter service
• Viton rubber gasket material
• Heavy-duty canister construction
• Designed for use with synthetic, conventional, and blended motor oils
• 1-Year Limited Warranty

Detailed Product Description

The K&N HP-4003 oil filter is engineered for engine protection and steady oil delivery in compatible Ram and Dodge trucks. Its pleated synthetic-blend filtration media is built to capture contaminants while maintaining flow, and the durable canister is made to handle regular service intervals. The welded hex nut on the end of the filter simplifies removal during maintenance, especially in tight underhood spaces. This part number, HP-4003, is a direct service choice for owners looking for a premium spin-on oil filter for heavy-duty truck use.

This part cross-references Gates 51607 for the same application.

What This Oil Filter Helps Address

• Engine contamination from suspended debris in motor oil
• Restricted oil flow caused by a loaded or inefficient filter
• Hard-to-remove filters during routine oil changes
• Seal concerns related to worn filter gasket material
• Service needs on Ram 2500, Ram 3500, and older Dodge Ram diesel and gas truck applications

Installation Notes and Fitment

Install as a spin-on oil filter using the specified 1 in-16UN-2B thread. Verify the existing filter size and mounting surface before installation, and follow the vehicle manufacturer’s oil change procedure and service interval. Fits 2021-2024 Ram 2500, N/A, Premium Oil Filter w/Wrench Off Nut; Spin On. Fits 2021-2024 Ram 3500, N/A, Premium Oil Filter w/Wrench Off Nut; Spin On. Fits 2011-2020 Ram 2500, N/A, Premium Oil Filter w/Wrench Off Nut. Fits 2011-2020 Ram 3500, N/A, Premium Oil Filter w/Wrench Off Nut. Fits 1994-2010 Dodge Ram 2500, N/A, Premium Oil Filter w/Wrench Off Nut. Fits 1994-2010 Dodge Ram 3500, N/A, Premium Oil Filter w/Wrench Off Nut. Fits 1989-1993 Dodge D250, N/A, Premium Oil Filter w/Wrench Off Nut. Fits 1989-1993 Dodge D350, N/A, Premium Oil Filter w/Wrench Off Nut. Fits 1989-1993 Dodge W250, N/A, Premium Oil Filter w/Wrench Off Nut. Fits 1989-1993 Dodge W350, N/A, Premium Oil Filter w/Wrench Off Nut.

Quality Assurance

K&N backs the HP-4003 with a 1-Year Limited Warranty. The filter is built with a heavy-duty canister, Viton rubber gasket, and premium filtration media for consistent service in compatible Ram and Dodge truck applications.