K&N KN-138 Engine Oil Filter

K&N KN-138 Oil Filter Overview

The K&N KN-138 oil filter is built for powersports engines that need strong oil flow and dependable contaminant control. It uses a high-flow premium synthetic-blend media and a heavy-duty spin-on canister for service-friendly maintenance.

Compatible With applications that use an M20 x 1 thread specification, this filter is designed for riders and builders looking for a durable oil filter with a 17 mm welded hex nut for easier removal. It is also a practical choice for Honda Civic and Toyota Corolla searchers comparing oil filter cross references and replacement options.

Key Features

• High Flow Premium Media for efficient filtration
• Spin-on style with M20 x 1 thread specification
• Anti-drain back valve helps retain oil in the filter after shutdown
• Bypass valve and PSI relief valve included
• 17 mm welded removal nut for quicker filter service
• Nitrile rubber gasket material
• Heavy-duty canister construction
• 1-Year Limited Warranty

Detailed Product Description

The KN-138 oil filter is engineered to work with synthetic, petroleum-based, and blended oils, including high-concentration synthetic racing oils. Its synthetic-blend filtration media is paired with a durable canister and internal valves that support steady oil delivery while helping protect engine components from harmful contaminants. The filter measures 3.031 inches tall and 2.813 inches in outside diameter, with a 17 mm removal nut for easier servicing in tight spaces.

This part cross-references PH6018 and 0436001 for the same application. For shoppers comparing Honda Civic oil filter and Toyota Corolla oil filter options, the KN-138 is a direct-fit style search term to verify against thread size and dimensions before ordering.

What This Oil Filter Helps Address

• Oil contamination from normal engine wear
• Hard-to-remove spin-on filters during routine maintenance
• Oil drain-back after engine shutdown
• Pressure fluctuations that can affect filtration performance
• Replacement needs for vehicles using M20 x 1 oil filter threads

Installation Notes and Tips

Verify thread specification, gasket sealing surface, height, and outside diameter before installation. Pre-lubricate the gasket with clean engine oil, tighten according to the vehicle manufacturer’s service procedure, and confirm there are no leaks after startup. The welded hex nut can be used with a 17 mm wrench or socket for removal.

For fitment-based searches, this filter is commonly researched by drivers looking for Honda Civic oil filter replacement and Toyota Corolla oil filter replacement, but final application confirmation should always match the vehicle’s required dimensions and thread pattern.

Quality Assurance

K&N backs the KN-138 with a 1-Year Limited Warranty. The filter is built with a heavy-duty canister and filtration media selected for high-flow service in powersports oiling systems.