Sale!
Designed to increase horsepower and acceleration
High air flow with excellent filtration
Washable and reusable
Will NOT void US automotive vehicle warranty
Emission legal in all 50 US States
Million mile limited warranty
Product Style: Motorcycle Intake System
Estimated Horsepower Gain: 6.54 HP @ 5100 RPM
Street Legal In All US States:No
TUV Approved (Europe): No
Clamp Style: No Clamps Required
Color: Red
Filter Height: 2.125 in (54 mm)
Filter Material: Cotton Gauze
Neck Flange: 2.4 in (61 mm)
Overall Height: 2.5 in (64 mm)
Replacement Filter: E-3975
Size: 9 Inch
Top Material/Finish: Aluminum
Top Style: Metal
Total Height: 2.5 in (64 mm)
Weight: 3.1 lb (1.4 kg)
Product Box Length: 11.75 in (298 mm)
Product Box Width: 9.5 in (241 mm)
Product Box Height: 4.88 in (124 mm)
K&N Custom Air Filter Assembly RK-3931 for HD FXD Dyna SuperGlide 08-11
Original price was: $159.99.$85.88Current price is: $85.88.
11 in stock
Description
K&N high flow air filters are dyno proven to increase horsepower, throttle response, and fuel economy. The smartest and most cost effective upgrade for your machine.
Filter Specs:
PROP 65 WARNING: Cancer and/or reproductive harm – www.P65Warnings.ca.gov











