Description
The K&N RK Series is engineered to deliver more horsepower for your Twin Cam Harley-Davidson engine. Designed around the renowned K&N High-Flow Air Filter, the RK Series assembly features a powder-coated billet aluminum back plate that eliminates external breathers and integrates a built-in, dyno-tuned velocity stack. This innovation results in a substantial increase in airflow to the engine while maintaining superior filtration. Retaining the stock air cleaner cover, the RK Series preserves the factory appearance. The RK-3910-1 model includes a larger air filter and longer spacers compared to the RK-3909-1, enhancing airflow for even greater performance.
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