R K&N Performance Air Filter Kit | K&N Filters | Filters & Fuelling

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K&N Performance Air Filter Kit

Part No: RK-3930

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Specification

Why K&N Filters

For over 40 years K&N has been designing and manufacturing performance air filters for motorcycles. They provide a high, virtually unrestricted air flow while maintaining filtration levels critical to ensure long engine life.

The K&N RK Series assembly retains a factory appearance by utilising the stock air cleaner cover and is designed to get more horsepower from the Twin Cam Harley-Davidson engine.

This assembly includes an innovative powder coated billet aluminum back plate that eliminates external breathers and features a built-in, dyno-tuned velocity stack, resulting in a significant airflow increase to the engine without sacrificing filtration.

K&N Engineering is the innovator of this unique cotton air filtration system. The High flow technology is the air filter choice for many racers and riders. It provides increased performance and outstanding protection to the engine.
 

  • Increased horsepower / Improved throttle response


K&N filters guarantee a superior air flow capacity to that of traditional paper or foam filters, ensuring better performance from the engine.

Constructed from 4-6 layers of cotton gauze soaked with low viscosity oil, K&N flow over 200% more air than paper air filters on a square inch by square inch basis.

Accordion style pleats provide a substantially larger surface area of filtration area over non-pleated foam filters.
 

  • Washable & re-usable, backed by a million-mile manufacturer’s warranty.


The Historic K&N red colour is from factory pre-oiling to enhance filtration efficiency.

The cotton gauze has the advantage of being washable and therefore reusable, so K&N filters represent excellent value for money as they can be used, cleaned and re-used over and over again!

The cleanable filter-medium is backed by the world’s first million-mile manufacturer’s warranty.

 

  • High quality fit & perfect seal

K&N filters have a high quality urethane or plastisol chassis seal selected for performance and durability ensuring a perfect seal to protect your engine from damaging particles.
 

  • Choice of Road or Race filters

Many sports bikes have the choice of a Road filter designed to increase airflow without upsetting standard fuelling or a Race filter designed to maximise airflow for applications where a jet kit or fuel injection tuning device will be used.

 

K&N Motorcycle Oil Filters

 

K&N Motorcyle Oil Filters boast excellent filtration levels with a high oil flow rate. They can be used for heavy duty applications and they will block 99% of dust and debris. K&N Motorcycle Oil Filters are great for all types of oils, including conventional and synthetic.

K&N delivers a Premium Oil Filter which is built to withstand the high demands of racing conditions. A large filter media provides high-flow rates and outstanding oil filtration to keep your motor running clean and smooth. K&N Oil Filters deliver performance and confidence!

 

  • High capacity and outstanding filtration
  • High-flow rates associated with Synthetic and Synthetic blended oils
  • Protected by a heavy-duty canister with a double-rolled seal
  • Check-Valve/Anti-drain Back Valve prevents drain-back and dry starts(where applicable)
  • Pre-Lubed base gasket provides excellent seal
  • 17mm Hex Nut Allows Easy-On, Easy Wrench-Off*
  • Pre-drilled for Safety Wire security
  • K&N Limited Warranty®
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