K&N Motorcycle Oil Filter KN-303C — High-Flow Synthetic-Blend, Heavy-Duty Canister, Welded 17mm Hex

K&N KN-303C is a high-capacity motorcycle oil filter built with a synthetic-blend media and a heavy-duty canister to deliver strong flow and reliable contaminant protection for a wide range of powersports engines.

Designed for riders and mechanics who demand durable filtration that works with modern engine oils, the KN-303C pairs a pleated synthetic-blend filter element with a reinforced steel canister and a welded 17mm hex for quick removal. It tolerates synthetic, conventional, and blended lubricants — including high-concentration racing formulations — and is engineered to match the longer service intervals many manufacturers now recommend.

How does the KN-303C maintain oil flow for performance engines?

The KN-303C is built to support high flow rates while still capturing harmful particles. Its media and internal design reduce restriction so oil circulates efficiently even under heavy loads, helping maintain consistent lubrication pressure.

• High-flow synthetic-blend filtration media engineered for low restriction
• Pleated element increases effective surface area for consistent throughput
• Heavy-duty canister resists deformation under pressure and heat

Will this filter work with my synthetic or racing oil?

Yes — the filter media is compatible with synthetic, petroleum, and blended oils, including higher-concentration racing oils. The materials are selected to remain stable and effective across the range of modern lubricant chemistries used in motorcycles and other powersports machines.

• Formulated specifically to be compatible with synthetic and conventional oils
• Stable media performance with higher additive concentrations found in racing oils
• Laboratory-tested for capacity and burst strength to ensure reliability

How easy is installation and later removal?

Installation follows the same steps as a standard spin-on filter; the KN-303C adds convenience with a welded 17mm hex for fast wrench-off removal. The heavy canister and secure seal help prevent leaks while making routine changes straightforward for home mechanics and shop techs alike.

• Welded 17mm hex nut allows quick, safe removal with a standard socket
• Designed to fit recommended service intervals without premature replacement
• Durable canister reduces risk of warping or seizing to the engine mount

What protection and testing back up this filter?

K&N subjects the KN-303C to lab testing for capacity and burst strength to verify performance under real-world stresses. The combination of pleated synthetic-blend media and heavy-duty construction helps trap contaminants while enduring the thermal and mechanical demands of motorcycle operation.

• Pleated media captures most harmful engine contaminants for extended service life
• Laboratory-verified capacity and burst strength for dependable protection
• Protected by a 1-Year Limited Warranty from K&N

Who this is for: The K&N KN-303C suits motorcyclists, small-shop mechanics, and powersports enthusiasts who need a robust, high-flow spin-on filter that tolerates modern synthetic and racing oils. It’s particularly useful for riders of compatible Kawasaki, Honda, Yamaha and other listed models who want a durable replacement ready for longer oil change intervals without compromising filtration performance.