K&N Motorcycle Oil Filter KN-173C for Harley Dyna — High-Flow Synthetic-Blend, 17mm Welded Hex

The K&N KN-173C is a premium motorcycle oil filter built with synthetic-blend media, a heavy-duty canister and a 17mm welded hex for quick removal, delivering high flow and reliable contaminant protection for compatible Harley Dyna models.

Built for powersports applications where durable construction and consistent oil flow matter, this K&N motorcycle oil filter is engineered to work with synthetic, petroleum and blended oils — including racing-grade synthetics. Its synthetic-blend filtration media balances contaminant capacity and flow, while the reinforced canister and laboratory testing ensure burst strength and longevity. K&N backs the filter with a 1-Year Limited Warranty.

How does this filter keep my engine protected without restricting flow?

The KN-173C uses a multilayer synthetic-blend media that traps harmful particles while allowing high oil throughput. That combination reduces the risk of oil starvation during high-demand riding and supports steady lubrication at factory-recommended service intervals.

• High-flow media design to support strong oil circulation
• Synthetic-blend fibers capture abrasive contaminants
• Engineered for capacity to match common service intervals
• Lab-tested for burst strength and reliability

Will this filter fit my Harley Dyna and work with modern oils?

Yes — the KN-173C is listed for a range of Harley Davidson Dyna models from the 1980s through the late 1990s, and it is compatible with conventional, synthetic and blended motor oils, including high-synthetic racing blends. Always confirm fitment against your model year and engine specifications.

• Fitment includes multiple FXD, FXDL, FXDS, FXDWG, FXDB, FXDC and FXB model years
• Designed for use with synthetic, petroleum and blended oils
• Suitable for higher-concentration synthetic racing oils
• Check OEM part cross-reference or vehicle manual before installation

What makes installation and removal easier for routine maintenance?

K&N designed the canister with a welded 17mm hex nut so you can use a standard wrench or socket for quick removal, eliminating the need for specialty tools. The heavy-duty construction also resists damage during handling and removal, simplifying repeated service cycles.

• 17mm welded hex nut for fast wrench-off removal
• Robust canister resists dents and deformation
• Standard thread and gasket for straightforward replacement
• Clear alignment and installation similar to OEM filters

How durable and well-tested is the KN-173C for demanding riding conditions?

This filter undergoes laboratory testing to verify burst strength and contaminant capacity, and the heavy-gauge canister construction is intended to withstand road and track use. The 1-Year Limited Warranty provides additional peace of mind for typical ownership and maintenance cycles.

• Laboratory-tested for burst strength and filtration capacity
• Heavy-duty canister built for demanding powersports use
• Designed to maintain performance across OEM recommended intervals
• Backed by K&N's 1-Year Limited Warranty

Who is this for: The K&N KN-173C is aimed at riders and mechanics who service Harley Dyna motorcycles from the listed years and want a high-flow, durable replacement that accepts modern oil formulations. It's a good choice for daily riders, weekend cruisers and track-day participants seeking reliable filtration, straightforward installation with a 17mm wrench, and the durability expected from a premium powersports component.