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The latest addition to K&N's RK Series
was developed to get more horsepower from your Twin Cam®
Harley-Davidson® engine. Built around the legendary
K&N High-Flow Air Filter, the new RK Series assembly
includes an innovative powder coated billet aluminum backplate
that eliminates external breathers and features a built-in,
dyno-tuned velocity stack. The result is a significant airflow
increase to the engine without sacrificing filtration. This
RK Series assembly retains a factory appearance by utilizing
the stock air cleaner cover, yet boasts superior filtration
and performance with a K&N stamped laser-etched beauty
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