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K&N High Performance AirCharger Intake System for 3.7L Engines by K&N Filters

Part no: KN-631559

K&N High Performance AirCharger Intake System for 3.7L Engines
$296.99 + free Shipping
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Please Verify Fitment

This product fits only specific vehicles. Select your vehicle to ensure it fits.

This item is excluded from all sales and promotions.

Product Details

Important Notes:

  • Mass Air Flow Sensor Adapter included when required
  • All intake tube ports needed for the specified applications are included


  • 2008-2009 Jeep Liberty KK with 3.7L Engine


K&N High Performance AirCharger Air Intake System for 3.7L engines are designed to dramatically reduce intake restriction as they smooth and straighten air flow. This allows your Jeep's engine to inhale a larger amount of air than the OEM air filter assembly. More air means more usable power and acceleration throughout the engine's RPM range. K&N air intake systems replace your Jeep's restrictive factory air filter and air intake housing.

Product Details:

  • Designed to boost acceleration
  • Designed to improve throttle response and engine sound
  • Free-Flowing High Density Polyethylene Tube
  • Replaces entire factory air intake system
  • Lasts up to 100,000 miles before service is required
  • Easy to install, usually in 90 minutes or less
  • K&N Million Mile Limited Warrant

Product Specifications:

  • Product Style: 63 Series AirCharger Kits
  • Estimated Horsepower Gain: 11.25 HP @ 4800 RPM
  • Air Filter Color: Red
  • Air Filter Outlet Shape: Round
  • Air Filter Large End Diameter: 7.5" (191 mm)
  • Air Filter Height: 6" (152 mm)
  • Weight: 12.2 lb (5.6 kg)
  • Air Filter Material: Cotton Gauze
  • Intake Pipe Color / Finish: Black
  • Street Legal In All US States: No
  • Vacuum Tubing Included: Yes
  • TUV Approved (Europe): No

Parts Included:

  • (1) High Performance AirCharger Intake System for 3.7L Engines

Years Covered:

2008 and 2009

For California residents: Proposition 65 Warning

Vehicle Fitment


Additional Information

BrandK&N Filters
SKU Aliases 57-1559

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