K&N Motorcycle Oil Filter KN-170C for Harley-Davidson — High-Flow Synthetic-Blend, Welded 17mm Hex Nut

The K&N KN-170C is a heavy-duty motorcycle oil filter built to deliver high flow and reliable contaminant protection for many Harley-Davidson models.

Built with a synthetic-blend filtration media and a rugged steel canister, this filter accepts synthetic, conventional, and blended motor oils — including high-concentration racing blends — while maintaining capacity and strength for extended service intervals. A welded 17mm hex nut on the canister enables quick removal and installation, and rigorous lab testing helps ensure burst resistance and sustained performance under demanding riding conditions.

How does the KN-170C keep my engine oil flowing smoothly?

This filter is engineered for high volumetric flow so oil circulates without restriction, helping maintain consistent lubrication under varied RPM and load conditions. The pleated synthetic-blend media balances filtration efficiency with low pressure drop.

• High-flow media design reduces oil restriction during high-demand riding.
• Pleated construction increases contaminant-holding capacity.
• Lab-tested to resist collapse or bursting at elevated pressures.

Is the KN-170C compatible with different oil types and extended service intervals?

The media in this K&N filter was formulated to work with modern lubricants — from conventional oils to advanced synthetic racing blends — so it won’t degrade or clog prematurely when you switch oil types. It also has the holding capacity to support longer intervals recommended by some manufacturers, provided you follow your bike’s service guidelines.

• Compatible with synthetic, petroleum, and blended oils.
• High contaminant capacity helps during extended drain intervals.
• Designed to meet manufacturer service schedules when used as directed.

What makes installation and removal easier compared with stock filters?

The KN-170C features a welded 17mm hex nut integrated into the canister so you can use a standard socket or wrench for quick removal. The robust steel housing is intended to withstand repeated hand and tool torque without damage.

• Welded 17mm hex nut for fast wrench-off removal.
• Heavy-duty canister resists dents and deformation during service.
• Standard thread and gasket dimensions for straightforward replacement.

How has K&N validated this filter for durability and protection?

Each filter is put through laboratory tests to confirm capacity and burst strength, ensuring the canister and media hold up to the pressures found in motorcycle oil systems. The product is backed by a 1-year limited warranty for added peace of mind.

• Laboratory testing for burst strength and filtration capacity.
• Durable steel construction to resist service stresses.
• Includes a one-year limited warranty from K&N.

Who is this for: The K&N KN-170C is aimed at riders and mechanics who maintain compatible Harley-Davidson Sportster, Softail, Touring and select older models and want a replacement filter that handles modern synthetic oils, high flow demands, and occasional extended service intervals. Choose this filter if you value durable construction, convenient wrench-off removal, and filtration media tuned for mixed oil types — but always follow your motorcycle manufacturer’s recommended oil-change schedule.