K&N Harley-Davidson Performance Air Intake System 57-1137

K&N Harley-Davidson Performance Air Intake System 57-1137

Give your Harley an aggressive appearance and more power with the K&N Performance Air Intake System!

*Please Verify Cross Reference Numbers Below

• Performance Air Intake System
• Fits Select Harley Davidson Touring, Softail, Twin-Cam and Sportster Motorcycle Models (See Last Images For Fitment)
• Washable and Reusable
• Guaranteed to Increase Horsepower
• Designed to Improve Throttle Response and Engine Sound
• Cast Aluminum High-Performance Intake Tube
• Integrated Internal Velocity Stack
• Built-in Breathers Replace OE Breathers
• Lasts Up to 100,000 Miles Before Service is Required (Depending on Driving Conditions)
• Easy to Install, Usually in 90 Minutes or Less
• Pre-Oiled Filter
• System Includes:
• Air Intake Filter
• Die-Cast Aluminum Throttle-Body Mounting Plate
• Mounting Hardware
• Product Specifications:
• Estimated Horsepower Gain: 5.35 HP @ 4758 RPM
• Air Filter Color: Red
• Air Filter Material: Cotton Gauze
• Air Filter Height: 5.25"
• Air Filter Outlet Length: 2.969"
• Air Filter Outlet Width: 2.969"
• Air Filter Outlet Shape: Round
• Intake Pipe Color: Black
• Intake Pipe Material: Die-Cast Aluminum
• Intake Pipe Inlet Length: 3"
• Intake Pipe Inlet Width: 3"
• Intake Pipe Outlet Length: 4"
• Intake Pipe Outlet Width: 4"
• CARB EO Number: D-269-59
• Street Legal in All US States
• Includes (1) Regular Stainless Steel Clamp
• Cross Reference Numbers:
• Arlen Ness 81005
• Performance Machine HS42001K
• Cross References Should Be Used for Comparison of Filters With Similar Dimensions
• K&N Million Mile Warranty
• Made in the U.S.A
• Sold As A Kit
• Quality Made Product

Choose an air intake system that is guaranteed to increase horsepower, improves throttle response and engine sound, and is eco-friendly! K&N Performance Air Intake Systems increase power by eliminating the restrictive stock OE air cleaner and replacing it with a high-flow air filter and cast aluminum intake tube. More horsepower is just the beginning; the cotton gauze air filter is washable and reusable, effectively reducing landfill waste and providing outstanding performance and protection for up to 100,000 miles before service is required (depending on driving conditions.) Installation is easy in about 90 minutes or less, and this air intake system is covered under an incredible 1,000,000 Miles/10 Year warranty.

California Prop 65 WARNING: This product may expose you to a chemical known to the State of California to cause cancer and birth defects or other reproductive harm

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