K&N Intake System-Harley Davidson (RK-3951S)

K&N Intake System-Harley Davidson (RK-3951S)K&N Street Metal Air Intake Systems for Harley Davidson motorcycles replace the restrictive stock OE air cleaner with an oversized K&N High Flow Air Filter and a high volume cast aluminum housing. If you're looking for an aggressive appearance but want a significant increase in airflow, resulting in more power, this high flow air intake system is exactly what your Harley needs. Installation is so simple, it can usually be done in 90 minutes or less.

CLEAN ONCE EVERY 3 YEARS: Engine air filter only needs cleaning every 50

Fits inside stock cover

The RP-5161 is a clamp-on filter that has a flange inside diameter of 3-1/4 inches and length of 2 inches

Monitors your K&N filter for air flow

The 57-1501 air intake comes with a large

K&N air intakes are designed to dramatically reduce air intake restriction as they smooth and straighten air flow for a guaranteed horsepower gain

UNIVERSAL FITMENT: Designed for use on a variety of applications

It has an open 360 degree free breathing 9 inch Filtercharger air filter element on top of a 5 inch high stainless steel velocity stack base

The intake tube has an attractive chrome-like finish that's made to last and it accommodates the factory mass air sensor and a replacement silicone crank case vent hose

Extends service interval of your K&N filter in dusty conditions

Ideal for reducing vibration problems

The base is 12 inches by 6 inches and the filter height is 6 inches