K&N Red Intake System for Harley-Davidson

SKU: KNNRK-3909-1

Air Cleaner Assembly

KN Motorcycle Air Intake Systems- Harley Davidson

K&n Engineering

K&N Red Intake System for Harley-Davidson

SKU: KNNRK-3909-1

Air Cleaner Assembly

KN Motorcycle Air Intake Systems- Harley Davidson

Sale ends in Calculating... Wed 14 Oct, 12:57 am AEST

Available from MFR. This item is available from the manufacturer's distribution centre. The dispatch timeframe shown is an estimate based on historical order processing and release times for this part. This item is not held in our own warehouse, and actual dispatch timing may vary depending on manufacturer workload and logistics at the time of ordering.

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Description

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 this RK Series assembly includes an innovative powder coated billet aluminum back plate 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. The RK-3910-1 comes with a larger air filter and longer spacers than the RK-3909-1.

Part Type

Air Cleaner Assembly

Data: v4.2 - Upd: 2026-10-10 19:39:26

Features

Designed to increase horsepower & torque
Dyno-tuned velocity stack
Excellent air filtration
Washable & Reusable Air Filter: Includes a High-Flow Air Filter that can go up to 100,000 miles before cleaning under normal highway driving conditions.
Washable and reusable

Specifications

Reference Information

Brand Name/s	K&n Engineering
StreetFX SKU	knnRK-3909-1
SFX Item ID	5356101
Supplier Item Code	5356101
Manufacturer SKU	RK-3909-1
Manufacturer UPC	24844294135
Alternative References	KANRK-3909-1