Rank Product Name Score
1 K&N KNN Air Filter , RG-1001RD K&N KNN Air Filter , RG-1001RD
Unbranded
9.6 GET ON AMAZON
2 K&N Universal Clamp-On Air Filter: High Performance, Premium, Washable, Replacement Filter: Flange Diameter: 4 In, Filter Height: 5.5 In, Flange Length: 1.125 In, Shape: Round Tapered, RG-1001RD K&N Universal Clamp-On Air Filter: High Performance, Premium, Washable, Replacement Filter: Flange Diameter: 4 In, Filter Height: 5.5 In, Flange Length: 1.125 In, Shape: Round Tapered, RG-1001RD
K&N
9.6 GET ON AMAZON
3 FILTERWEARS Pre-Filter F102R For SPECTRE 8132 8136 K&N RG-1001; RED FILTERWEARS Pre-Filter F102R For SPECTRE 8132 8136 K&N RG-1001; RED
FILTERWEARS
9.4 GET ON AMAZON
4 K&N RX-4990DK Black Drycharger Filter Wrap - For Your K&N 57S-9500 Filter K&N RX-4990DK Black Drycharger Filter Wrap – For Your K&N 57S-9500 Filter
K&N Engineering
9.0 GET ON AMAZON
5 K&N Universal Clamp-On Air Filter: High Performance, Premium, Replacement Engine Filter: Flange Diameter: 2.75 In, Filter Height: 4.5 In, Flange Length: 1 In, Shape: Round Tapered, RG-1003RD-L K&N Universal Clamp-On Air Filter: High Performance, Premium, Replacement Engine Filter: Flange Diameter: 2.75 In, Filter Height: 4.5 In, Flange Length: 1 In, Shape: Round Tapered, RG-1003RD-L
K&N Engineering
8.8 GET ON AMAZON
6 K&N Universal Clamp-On Air Filter: High Performance, Premium, Washable, Replacement Engine Filter: Flange Diameter: 6 In, Filter Height: 7.5 In, Flange Length: 1 In, Shape: Round Tapered, RF-1041 K&N Universal Clamp-On Air Filter: High Performance, Premium, Washable, Replacement Engine Filter: Flange Diameter: 6 In, Filter Height: 7.5 In, Flange Length: 1 In, Shape: Round Tapered, RF-1041
K&N Engineering
8.5 GET ON AMAZON
7 K&N Universal Clamp-On Air Filter: High Performance, Premium, Washable, Replacement Filter: Flange Diameter: 4 In, Filter Height: 7.5 In, Flange Length: 1.5 In, Shape: Oval Straight, RF-1040 K&N Universal Clamp-On Air Filter: High Performance, Premium, Washable, Replacement Filter: Flange Diameter: 4 In, Filter Height: 7.5 In, Flange Length: 1.5 In, Shape: Oval Straight, RF-1040
K&N Engineering
8.5 GET ON AMAZON
8 K&N Universal Clamp-On Air Filter: High Performance, Premium, Washable, Replacement Filter: Flange Diameter: 4 In, Filter Height: 5.5 In, Flange Length: 1.125 In, Shape: Round Tapered, RG-1001BL K&N Universal Clamp-On Air Filter: High Performance, Premium, Washable, Replacement Filter: Flange Diameter: 4 In, Filter Height: 5.5 In, Flange Length: 1.125 In, Shape: Round Tapered, RG-1001BL
K&N
8.2 GET ON AMAZON
9 K&N Engine Air Filter: High Performance, Washable, Replacement Filter: Fits 2007-2019 Ford/Lincoln Truck and SUV (F150, F150 Raptor, Expedition, Navigator, F250, F350, F450, F550, F650), 33-2385 K&N Engine Air Filter: High Performance, Washable, Replacement Filter: Fits 2007-2019 Ford/Lincoln Truck and SUV (F150, F150 Raptor, Expedition, Navigator, F250, F350, F450, F550, F650), 33-2385
K&N Engineering
8.1 GET ON AMAZON
10 K&N Universal Clamp-On Air Filter: High Performance, Premium, Washable, Replacement Engine Filter: Flange Diameter: 6 In, Filter Height: 6.5 In, Flange Length: 1 In, Shape: Round Tapered, RF-1042 K&N Universal Clamp-On Air Filter: High Performance, Premium, Washable, Replacement Engine Filter: Flange Diameter: 6 In, Filter Height: 6.5 In, Flange Length: 1 In, Shape: Round Tapered, RF-1042
K&N Engineering
8.1 GET ON AMAZON

K&N KNN Air Filter , RG-1001RD

K&N KNN Air Filter , RG-1001RD

    Features:

  • Air Filter Large End Diameter 6 in (152 mm) Air Filter Shape Round Tapered Base Outside Diameter 6 in (152 mm) Color Red Filter Material Cotton Gauze Flange Inside Diameter 4 in (102 mm)
  • Flange Inside Diameter 2 3.5 in (89 mm) Flange Inside Diameter 3 3 in (76 mm) Flange Length 1.125 in (29 mm) Flange Type Centered Flanges 1 Height 5.5 in (140 mm)
  • Package Contents 1 Air Filter Package Quantity 1 Product Box Height 7.75 in (197 mm) Product Box Length 7.56 in (192 mm) Product Box Width 6.38 in (162 mm)
  • Product Style Round Tapered Universal Air Filter Top Material/Finish Chrome Top Outside Diameter 4.75 in (121 mm) Top Style Metal Weight 1.7 lb (0.8 kg)

K&N Universal Clamp-On Air Filter: High Performance, Premium, Washable, Replacement Filter: Flange Diameter: 4 In, Filter Height: 5.5 In, Flange Length: 1.125 In, Shape: Round Tapered, RG-1001RD

K&N Universal Clamp-On Air Filter: High Performance, Premium, Washable, Replacement Filter: Flange Diameter: 4 In, Filter Height: 5.5 In, Flange Length: 1.125 In, Shape: Round Tapered, RG-1001RD

    Features:

  • ENGINEERED POWER: State-of-the-art filtration media provides up to 50% more airflow than disposable paper filters to increase power and acceleration. Clogged or dirty air filters can reduce your vehicle’s acceleration by up to 10%.
  • EASY INSTALLATION: Pre-oiled and built with simple clamp-on design. One of the easiest and most cost-effective upgrades for your vehicle for quick performance gains.
  • SAVES MONEY: K&N high-flow replacement air filters will save you $250 over 10 years by avoiding disposable filters.
  • ECO-FRIENDLY: Using a washable, reusable product helps reduce replacement waste. A K&N filter will last longer than 10 disposable filters.
  • WORLD CLASS PROTECTION: Pushing the limits of engine protection by protecting your engine from harmful contaminants.
  • LOW-MAINTENANCE DESIGN: 50,000 miles before your first cleaning under normal highway driving conditions.
  • HIGH QUALITY: Made in America.
  • RACE TESTED: The Official Air Filter of NASCAR. Trusted on the racetrack—made for your vehicle.
  • NO-HASSLE WARRANTY: 1-Year Limited Warranty

FILTERWEARS Pre-Filter F102R For SPECTRE 8132 8136 K&N RG-1001; RED

FILTERWEARS Pre-Filter F102R For SPECTRE 8132 8136 K&N RG-1001; RED

    Features:

  • Reduces overall maintenance cost, Extends filter service intervals, Adds convenience, Extends the life of any filter exposed or not
  • Keeps your high performance filter free of debris/dirt and water, Effective barrier for any particle bigger than .005 inches
  • No reduction of functionality in freezing temperatures, Hydrophobic fabric is standard (water repellent), Handles heat up to 450 degrees Fahrenheit
  • Made from 100% monofilament polyester, straps at the base of pre-filter for easy installation

K&N RX-4990DK Black Drycharger Filter Wrap – For Your K&N 57S-9500 Filter

K&N RX-4990DK Black Drycharger Filter Wrap - For Your K&N 57S-9500 Filter

    Features:

  • This product wraps your air filter with an additional pre-filter
  • Extends service interval of your K&N filter
  • Durable silicone treated polyester material with stitched elastic openings
  • Water repellent treatment typically lasts 1 to 2 years

K&N Universal Clamp-On Air Filter: High Performance, Premium, Replacement Engine Filter: Flange Diameter: 2.75 In, Filter Height: 4.5 In, Flange Length: 1 In, Shape: Round Tapered, RG-1003RD-L

K&N Universal Clamp-On Air Filter: High Performance, Premium, Replacement Engine Filter: Flange Diameter: 2.75 In, Filter Height: 4.5 In, Flange Length: 1 In, Shape: Round Tapered, RG-1003RD-L

    Features:

  • ENGINEERED POWER: State-of-the-art filtration media provides up to 50% more airflow than disposable paper filters to increase power and acceleration. Clogged or dirty air filters can reduce your vehicle’s acceleration by up to 10%.
  • EASY INSTALLATION: Pre-oiled and built with simple clamp-on design. One of the easiest and most cost-effective upgrades for your vehicle for quick performance gains.
  • SAVES MONEY: K&N high-flow replacement air filters will save you $250 over 10 years by avoiding disposable filters.
  • ECO-FRIENDLY: Using a washable, reusable product helps reduce replacement waste. A K&N filter will last longer than 10 disposable filters.
  • WORLD CLASS PROTECTION: Pushing the limits of engine protection by protecting your engine from harmful contaminants.
  • LOW-MAINTENANCE DESIGN: 50,000 miles before your first cleaning under normal highway driving conditions.
  • HIGH QUALITY: Made in America.
  • RACE TESTED: The Official Air Filter of NASCAR. Trusted on the racetrack—made for your vehicle.
  • NO-HASSLE WARRANTY: 1-Year Limited Warranty

K&N Universal Clamp-On Air Filter: High Performance, Premium, Washable, Replacement Engine Filter: Flange Diameter: 6 In, Filter Height: 7.5 In, Flange Length: 1 In, Shape: Round Tapered, RF-1041

K&N Universal Clamp-On Air Filter: High Performance, Premium, Washable, Replacement Engine Filter: Flange Diameter: 6 In, Filter Height: 7.5 In, Flange Length: 1 In, Shape: Round Tapered, RF-1041

    Features:

  • ENGINEERED POWER: State-of-the-art filtration media provides up to 50% more airflow than disposable paper filters to increase power and acceleration. Clogged or dirty air filters can reduce your vehicle’s acceleration by up to 10%.
  • EASY INSTALLATION: Pre-oiled and built with simple clamp-on design. One of the easiest and most cost-effective upgrades for your vehicle for quick performance gains.
  • SAVES MONEY: K&N high-flow replacement air filters will save you $250 over 10 years by avoiding disposable filters.
  • ECO-FRIENDLY: Using a washable, reusable product helps reduce replacement waste. A K&N filter will last longer than 10 disposable filters.
  • WORLD CLASS PROTECTION: Pushing the limits of engine protection by protecting your engine from harmful contaminants.
  • LOW-MAINTENANCE DESIGN: 50,000 miles before your first cleaning under normal highway driving conditions.
  • HIGH QUALITY: Made in America.
  • RACE TESTED: The Official Air Filter of NASCAR. Trusted on the racetrack—made for your vehicle.
  • NO-HASSLE WARRANTY: 1-Year Limited Warranty

K&N Universal Clamp-On Air Filter: High Performance, Premium, Washable, Replacement Filter: Flange Diameter: 4 In, Filter Height: 7.5 In, Flange Length: 1.5 In, Shape: Oval Straight, RF-1040

K&N Universal Clamp-On Air Filter: High Performance, Premium, Washable, Replacement Filter: Flange Diameter: 4 In, Filter Height: 7.5 In, Flange Length: 1.5 In, Shape: Oval Straight, RF-1040

    Features:

  • ENGINEERED POWER: State-of-the-art filtration media provides up to 50% more airflow than disposable paper filters to increase power and acceleration. Clogged or dirty air filters can reduce your vehicle’s acceleration by up to 10%.
  • EASY INSTALLATION: Pre-oiled and built with simple clamp-on design. One of the easiest and most cost-effective upgrades for your vehicle for quick performance gains.
  • SAVES MONEY: K&N high-flow replacement air filters will save you $250 over 10 years by avoiding disposable filters.
  • ECO-FRIENDLY: Using a washable, reusable product helps reduce replacement waste. A K&N filter will last longer than 10 disposable filters.
  • WORLD CLASS PROTECTION: Pushing the limits of engine protection by protecting your engine from harmful contaminants.
  • LOW-MAINTENANCE DESIGN: 50,000 miles before your first cleaning under normal highway driving conditions.
  • HIGH QUALITY: Made in America.
  • RACE TESTED: The Official Air Filter of NASCAR. Trusted on the racetrack—made for your vehicle.
  • NO-HASSLE WARRANTY: 1-Year Limited Warranty

K&N Universal Clamp-On Air Filter: High Performance, Premium, Washable, Replacement Filter: Flange Diameter: 4 In, Filter Height: 5.5 In, Flange Length: 1.125 In, Shape: Round Tapered, RG-1001BL

K&N Universal Clamp-On Air Filter: High Performance, Premium, Washable, Replacement Filter: Flange Diameter: 4 In, Filter Height: 5.5 In, Flange Length: 1.125 In, Shape: Round Tapered, RG-1001BL

    Features:

  • ENGINEERED POWER: State-of-the-art filtration media provides up to 50% more airflow than disposable paper filters to increase power and acceleration. Clogged or dirty air filters can reduce your vehicle’s acceleration by up to 10%.
  • EASY INSTALLATION: Pre-oiled and built with simple clamp-on design. One of the easiest and most cost-effective upgrades for your vehicle for quick performance gains.
  • SAVES MONEY: K&N high-flow replacement air filters will save you $250 over 10 years by avoiding disposable filters.
  • ECO-FRIENDLY: Using a washable, reusable product helps reduce replacement waste. A K&N filter will last longer than 10 disposable filters.
  • WORLD CLASS PROTECTION: Pushing the limits of engine protection by protecting your engine from harmful contaminants.
  • LOW-MAINTENANCE DESIGN: 50,000 miles before your first cleaning under normal highway driving conditions.
  • HIGH QUALITY: Made in America.
  • RACE TESTED: The Official Air Filter of NASCAR. Trusted on the racetrack—made for your vehicle.
  • NO-HASSLE WARRANTY: 1-Year Limited Warranty

K&N Engine Air Filter: High Performance, Washable, Replacement Filter: Fits 2007-2019 Ford/Lincoln Truck and SUV (F150, F150 Raptor, Expedition, Navigator, F250, F350, F450, F550, F650), 33-2385

K&N Engine Air Filter: High Performance, Washable, Replacement Filter: Fits 2007-2019 Ford/Lincoln Truck and SUV (F150, F150 Raptor, Expedition, Navigator, F250, F350, F450, F550, F650), 33-2385

    Features:

  • ULTIMATE LONGEVITY: 10-Year/Million Mile Limited Warranty protects for the life of your vehicle.
  • ENGINEERED POWER: State-of-the-art filtration media provides up to 50% more airflow than disposable paper filters to increase power and acceleration. Clogged or dirty air filters can reduce your vehicle’s acceleration by up to 10%.
  • EASY INSTALLATION: Pre-oiled and ready to drop into your factory air box. One of the easiest and most cost-effective upgrades for your vehicle for quick performance gains.
  • SAVES MONEY: K&N high-flow replacement air filters will save you $250 over 10 years by avoiding disposable filters.
  • ECO-FRIENDLY: Using a washable, reusable product helps reduce replacement waste. A K&N filter will last longer than 10 disposable filters.
  • WORLD CLASS PROTECTION: Pushing the limits of engine protection by protecting your engine from harmful contaminants.
  • LOW-MAINTENANCE DESIGN: 50,000 miles before your first cleaning under normal highway driving conditions.
  • HIGH QUALITY: Made in America.
  • RACE TESTED: The Official Air Filter of NASCAR. Trusted on the racetrack—made for your vehicle.

K&N Universal Clamp-On Air Filter: High Performance, Premium, Washable, Replacement Engine Filter: Flange Diameter: 6 In, Filter Height: 6.5 In, Flange Length: 1 In, Shape: Round Tapered, RF-1042

K&N Universal Clamp-On Air Filter: High Performance, Premium, Washable, Replacement Engine Filter: Flange Diameter: 6 In, Filter Height: 6.5 In, Flange Length: 1 In, Shape: Round Tapered, RF-1042

    Features:

  • ENGINEERED POWER: State-of-the-art filtration media provides up to 50% more airflow than disposable paper filters to increase power and acceleration. Clogged or dirty air filters can reduce your vehicle’s acceleration by up to 10%.
  • EASY INSTALLATION: Pre-oiled and built with simple clamp-on design. One of the easiest and most cost-effective upgrades for your vehicle for quick performance gains.
  • SAVES MONEY: K&N high-flow replacement air filters will save you $250 over 10 years by avoiding disposable filters.
  • ECO-FRIENDLY: Using a washable, reusable product helps reduce replacement waste. A K&N filter will last longer than 10 disposable filters.
  • WORLD CLASS PROTECTION: Pushing the limits of engine protection by protecting your engine from harmful contaminants.
  • LOW-MAINTENANCE DESIGN: 50,000 miles before your first cleaning under normal highway driving conditions.
  • HIGH QUALITY: Made in America.
  • RACE TESTED: The Official Air Filter of NASCAR. Trusted on the racetrack—made for your vehicle.
  • NO-HASSLE WARRANTY: 1-Year Limited Warranty

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