K&N Custom Air Filter E-3971
K&N introduces the E-3971 which allows virtually unrestricted airflow while providing excellent filtration. “The E-3971 is a replacement air filter that can fit select Indian motorcycle applications,” says Tom Brown, Project Manager at K&N Engineering. “It is 1/4” taller than the E-3226 so it has more filter media allowing additional flow capabilities.”
The E-3971 is a custom air filter 2.75 inches in height with an inside diameter of 4.625 inches and an outside diameter of 6”. This filter will fit any application meeting these requirements.
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