Bill Smith
Founder, 1929-2014
Speedy Bill
Since 1952
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Shop K&N Filters At Speedway Motors

K&N Engineering is the world's leading manufacturer of washable performance air filters and air intake systems. Since creating the reusable high flow cotton air filter in 1969, K&N has spent over 40 years perfecting and designing over 5,000 different products for cars, trucks, motorcycles, engines, and industrial applications. Go with the company that stands behind their products and consumers 100%, go with K&N Filters.

"K&N Filters Air Filters" Page 1 of 2

  • K&N Filters E-3750 Replacement Filter Element, 14 x 4 Inch
    K&N Filters E-3750 Replacement Filter Element, 14 x 4 Inch
    x
                

    K&N FilterCharger replacement air filter elements are designed to achieve high, virtually unrestricted air flow while maintaining filtration levels critical to ensuring long engine life. The high flow cotton gauze filter material is washable, reusable and built to outlast and outperform any other filter on the market.

    • High ir flow with excellent filtration
    • Designed to increase horsepower and acceleration
    • Washable and reusable
  • K&N Filters E-3760 Replacement Filter Element, 14 x 5 Inch
    K&N Filters E-3760 Replacement Filter Element, 14 x 5 Inch
    x
                

    K&N FilterCharger replacement air filter elements are designed to achieve high, virtually unrestricted air flow while maintaining filtration levels critical to ensuring long engine life. The high flow cotton gauze filter material is washable, reusable and built to outlast and outperform any other filter on the market.

    • High ir flow with excellent filtration
    • Designed to increase horsepower and acceleration
    • Washable and reusable
  • K&N 4 Inch Single Type Injector Stack Air Filters, 2-1/2 Inch, Set/8
    K&N 4 Inch Single Type Injector Stack Air Filters, 2-1/2 Inch, Set/8
    x
                For use with cut velocity stacks, or straight pieces of exhaust tubing. Flat rubber bases with molded-in velocity stack type radius and step for smooth bore down from element to tube. 

    Filters measure 3-1/2" diameter and 4" tall.

  • K&N Dual Injector Filters, 2-3/8 Inch, Set/4
    K&N Dual Injector Filters, 2-3/8 Inch, Set/4
    x
                

    These K&N straight injection filters are for fuel injection applications like Kinsler "straight" 3-piece, Pontiac and Chevrolet small block V8. Top plate measures 9" x 5-1/2", total height of filter 6-3/4".

  • K&N Filters RD-4400 Tapered Injection Filter, 2-1/4 Inch
    K&N Filters RD-4400 Tapered Injection Filter, 2-1/4 Inch
    x
                

    Single tapered filter for Chevy with 9" x 5-1/2" oval aluminum top plate. Total height is 6-3/4". Designed for late-style Hilborn tapered model Q with siamese stacks.

  • K&N 6 Inch Single Type Injector Stack Air Filters, 2-1/4 Inch, Set/8
    K&N 6 Inch Single Type Injector Stack Air Filters, 2-1/4 Inch, Set/8
    x
                For use with cut velocity stacks, or straight pieces of exhaust tubing. Flat rubber bases come with molded-in velocity stack type radius and step for smooth bore down from element to tube. 

    Filters measure 3-1/2" diameter and 6" tall.


  • K&N Tapered Injector Air Filter Set, 2-1/8 Inch
    K&N Tapered Injector Air Filter Set, 2-1/8 Inch
    x
                

    These K&N tapered injection filters are designed from late-style Hilborn "tapered" Model R with siamese stacks. Oval aluminum top plate measures 9" x 5-1/2". Total height is 6-3/4".

    • 2-1/8" I.D. flange
    • 2-1/16" injector bore
    • Available in set of four for Chevy
  • K&N Filters RD-0520 6 Inch Single Stack Injector Air Filter 2-1/8 Inch
    K&N Filters RD-0520 6 Inch Single Stack Injector Air Filter 2-1/8 Inch
    x
                For use with cut velocity stacks, or straight pieces of exhaust tubing. Flat rubber bases come with molded-in velocity stack type radius and step for smooth bore down from element to tube. 

    Filters measure 3-1/2" diameter and 6" tall.


  • K&N 4 Inch Single Type Injector Stack Air Filters, 2-1/4 Inch, Set/8
    K&N 4 Inch Single Type Injector Stack Air Filters, 2-1/4 Inch, Set/8
    x
                For use with cut velocity stacks, or straight pieces of exhaust tubing. Flat rubber bases with molded-in velocity stack type radius and step for smooth bore down from element to tube. 

    Filters measure 3-1/2" diameter and 4" tall.

  • K&N 4 Inch Single Type Injector Stack Air Filters, 2-1/8 Inch, Set/8
    K&N 4 Inch Single Type Injector Stack Air Filters, 2-1/8 Inch, Set/8
    x
                For use with cut velocity stacks, or straight pieces of exhaust tubing. Flat rubber bases with molded-in velocity stack type radius and step for smooth bore down from element to tube. 

    Filters measure 3-1/2" diameter and 4" tall.

  • K&N Filters 61-4000 Flow Control Air Cleaner-Holley 4BBL no Choke Horn
    K&N Filters 61-4000 Flow Control Air Cleaner-Holley 4BBL no Choke Horn
    x
                A revolution in air cleaner technology! The Flow Control System utilizes a specially contoured base in combination with a unique lid, featuring a tongue or protrusion that reduces intake turbulance. The resulting smooth, laminar flow enhances cylinder filling with a typical 15+ HP increase on a 350 cubic inch engine.

    Includes the reusable K&N Filtercharger filter element for maximum airflow, filtration, and serviceability.

    Available for carbs with or without choke air horn. "With choke" means the choke horn is still on the carb. "Without choke" means the choke horn has been removed.

    Flow Control for Holley 4-barrel

    • For 390-850 CFM carbs
    • 14" x 4"
    • Drop: 0.125"
    • Ht. Above Carb Flange: 4.25"
    • Weight: 5 lb

    Will not fit Holley Pro Series (Dominator) or HP Series carburetors.

    465-614000 Instructions (PDF)

  • Garage Sale - K&N Replacement Filter Element, 14X4
    Garage Sale
    Garage Sale - K&N Replacement Filter Element, 14X4
    x
                

    K&N FilterCharger replacement air filter elements are designed to achieve high, virtually unrestricted air flow while maintaining filtration levels critical to ensuring long engine life. The high flow cotton gauze filter material is washable, reusable and built to outlast and outperform any other filter on the market.

    • High Air Flow with Excellent Filtration
    • Designed to Increase Horsepower and Acceleration
    • Washable and Reusable

    This air filter is garage sale priced because it was slightly crushed in shipping.

     

    NO WARRANTY, NO RETURNS ON GARAGE SALE ITEMS

     

  • K&N 6 Inch Single Type Injector Stack Air Filters, 2-1/8 Inch, Set/8
    K&N 6 Inch Single Type Injector Stack Air Filters, 2-1/8 Inch, Set/8
    x
                For use with cut velocity stacks, or straight pieces of exhaust tubing. Flat rubber bases come with molded-in velocity stack type radius and step for smooth bore down from element to tube. 

    Filters measure 3-1/2" diameter and 6" tall.


  • K&N Filters RD-0620 6 Inch Single Stack Injector Air Filter 2-1/4 Inch
    K&N Filters RD-0620 6 Inch Single Stack Injector Air Filter 2-1/4 Inch
    x
                For use with cut velocity stacks, or straight pieces of exhaust tubing. Flat rubber bases come with molded-in velocity stack type radius and step for smooth bore down from element to tube. 

    Filters measure 3-1/2" diameter and 6" tall.


  • K&N Filters RD-4200 Tapered Injection Filter, 2-1/8 Inch
    K&N Filters RD-4200 Tapered Injection Filter, 2-1/8 Inch
    x
                

    Single tapered filter for Chevy with 9" x 5-1/2" oval aluminum top plate. Total height is 6-3/4". Designed for late-style Hilborn tapered model R with siamese stacks.

  • K&N Filters 61-2020 Flow Control Air Cleaner-Holley 2BBL no Choke Horn
    K&N Filters 61-2020 Flow Control Air Cleaner-Holley 2BBL no Choke Horn
    x
                A revolution in air cleaner technology! The Flow Control System utilizes a specially contoured base in combination with a unique lid, featuring a tongue or protrusion that reduces intake turbulance. The resulting smooth, laminar flow enhances cylinder filling with a typical 15+ HP increase on a 350 cubic inch engine.

    Includes the reusable K&N Filtercharger filter element for maximum airflow, filtration, and serviceability.

    Available for carbs with or without choke air horn. "With choke" means the choke horn is still on the carb. "Without choke" means the choke horn has been removed.

    465-612020 Instructions (PDF)

  • K&N Filters RD-4600 Tapered Injection Filter, 2-1/2 Inch
    K&N Filters RD-4600 Tapered Injection Filter, 2-1/2 Inch
    x
                

    Single tapered filter for Chevy with 9" x 5-1/2" oval aluminum top plate. Total height is 6-3/4". Designed for late-style Hilborn tapered model P with siamese stacks.

  • K&N Filters E-3650 Replacement Element for Velocity Stack, 9 x 5 Inch
    K&N Filters E-3650 Replacement Element for Velocity Stack, 9 x 5 Inch
    x
                

    K&N 9" x 5" filter element.

  • K&N Filters 100-8567 Sprint Car Air Box & Base Without Holes
    K&N Filters 100-8567 Sprint Car Air Box & Base Without Holes
    x
                

    If you're looking for maximum airflow at a lighter weight, then this airbox is for you. Flows up to 2700 CFM and weighs in at only 3-1/2 lbs. thanks to the high-tech carbon fiber base. Completely washable and reusable.

  • K&N Filters 100-8570 Midget Air Filter, 6-1/2 Inch Tall
    K&N Filters 100-8570 Midget Air Filter, 6-1/2 Inch Tall
    x
                

    Lightweight yet durable, this air box is a must for any racer currently using traditional multi-siamese stacks. Constructed from ultra-lightweight carbon fiber and weighing in at just under 4.5 lbs, K&N's Midget Style air box provides ample air flow for your racing needs.

    • Base does not have holes cut, so it fits most stack configurations
    • Once base is in place, slip the main filter assembly over the stacks
    • Supplied spring clip clamps secure the filter for positive seal and ease of servicing
  • K&N Tapered Injector Air Filter Set, 2-1/2 Inch
    K&N Tapered Injector Air Filter Set, 2-1/2 Inch
    x
                

    These K&N tapered injection filters are designed from late-style Hilborn "tapered" Model P with siamese stacks. Oval aluminum top plate measures 9" x 5-1/2". Total height is 6-3/4".

    • 2-1/2" I.D. flange
    • 2-7/16" injector bore
    • Available in set of four for Chevy
  • K&N Filters RD-5000 Dual Injector Filter, 2-3/8 Inch
    K&N Filters RD-5000 Dual Injector Filter, 2-3/8 Inch
    x
                

    These K&N straight injection filters are for fuel injection applications like Kinsler "straight" 3-piece, Pontiac and Chevrolet small block V8. Top plate measures 9" x 5-1/2", total height of filter 6-3/4".

  • K&N Filters RD-5020 Dual Injector Filter, 2-5/8 Inch
    K&N Filters RD-5020 Dual Injector Filter, 2-5/8 Inch
    x
                

    These K&N straight injection filters are for fuel injection applications like Kinsler "straight" 3-piece, Pontiac and Chevrolet small block V8. Top plate measures 9" x 5-1/2", total height of filter 6-3/4".

  • K&N Filters 100-8576 Midget Air Filter, 4-3/4 Inch Tall
    K&N Filters 100-8576 Midget Air Filter, 4-3/4 Inch Tall
    x
                

    Lightweight yet durable, this air box is a must for any racer currently using traditional multi-siamese stacks. Constructed from ultra-lightweight carbon fiber and weighing in at 3.2 lbs, K&N's Midget Style air box provides ample air flow for your racing needs.

    • Base does not have holes cut, so it fits most stack configurations
    • Once base is in place, slip the main filter assembly over the stacks
    • Supplied spring clip clamps secure the filter for positive seal and ease of servicing
  • K&N Filters RD-0700 4 Inch Single Stack Injector Air Filter 2-1/2 Inch
    K&N Filters RD-0700 4 Inch Single Stack Injector Air Filter 2-1/2 Inch
    x
                For use with cut velocity stacks, or straight pieces of exhaust tubing. Flat rubber bases with molded-in velocity stack type radius and step for smooth bore down from element to tube. 

    Filters measure 3-1/2" diameter and 4" tall.

  • Garage Sale - K&N 4 Inch Single Type Injector Stack Air Filter, 2-1/8 Inch
    Garage Sale
    Garage Sale - K&N 4 Inch Single Type Injector Stack Air Filter, 2-1/8 Inch
    x
                For use with cut velocity stacks, or straight pieces of exhaust tubing. Flat rubber bases with molded-in velocity stack type radius and step for smooth bore down from element to tube.

    Filters measure 3-1/2" diameter and 4" tall.

     

    This is garage sale priced because it has been used. 

     

    NO WARRANTY, NO RETURNS ON GARAGE SALE ITEMS 

  • K&N Dual Injector Filters, 2-5/8 Inch, Set/4
    K&N Dual Injector Filters, 2-5/8 Inch, Set/4
    x
                

    These K&N straight injection filters are for fuel injection applications like Kinsler "straight" 3-piece, Pontiac and Chevrolet small block V8. Top plate measures 9" x 5-1/2", total height of filter 6-3/4".

  • K&N Filters 66-1401 X-Stream Flow Air Cleaner Top
    K&N Filters 66-1401 X-Stream Flow Air Cleaner Top
    x
                Replace the lid of your 14" diameter air cleaner with this filter lid from K&N. Increases air flow by about 30%. Dyno tests have shown up to 20 hp increase.
            
  • K&N Filters 61-4020 Flow Control Air Cleaner-Holley 4BBL w/ Choke Horn
    K&N Filters 61-4020 Flow Control Air Cleaner-Holley 4BBL w/ Choke Horn
    x
                A revolution in air cleaner technology! The Flow Control System utilizes a specially contoured base in combination with a unique lid, featuring a tongue or protrusion that reduces intake turbulance. The resulting smooth, laminar flow enhances cylinder filling with a typical 15+ HP increase on a 350 cubic inch engine.

    Includes the reusable K&N Filtercharger filter element for maximum airflow, filtration, and serviceability.

    Available for carbs with or without choke air horn. "With choke" means the choke horn is still on the carb. "Without choke" means the choke horn has been removed.

    Flow Control for Holley 4-barrel

    • For 390-850 CFM carbs
    • 14" x 4"
    • Drop: 0.156"
    • Ht. Above Carb Flange: 4.375"
    • Weight: 5 lb

    Will not fit Holley Pro Series (Dominator) or HP Series carburetors.

    465-614020 Instructions (PDF)

  • K&N Small Two-Injector Filter
    $255.99
    K&N Small Two-Injector Filter
    x
                

    K&N 2-injector filter available for Midget and Mirco/Mini Sprint cars. Lightweight yet durable, K&N's Sprint Car Style Air Boxes are a must for any racer currently using traditional multi-siamese stacks. Constructed from ultra-lightweight carbon fiber, K&N's Sprint Car Style air box provides ample air flow for your racing needs. As with all K&N filters, it is a washable and reusable air filter. Simply use K&N oil and cleaner to service your filter.

  • Garage Sale - K&N Dual Injector Filter, 2-3/8 Inch
    Garage Sale
    Garage Sale - K&N Dual Injector Filter, 2-3/8 Inch
    x
                

    These K&N straight injection filters are for fuel injection applications like Kinsler "straight" 3-piece, Pontiac and Chevrolet small block V8. Top plate measures 9" x 5-1/2", total height of filter 6-3/4".

    This filter is garage sale priced because it has some scratches and can't be sold as a first. 

     

    NO WARRANTY, NO RETURNS ON GARAGE SALE ITEMS 

  • K&N Tapered Injector Air Filter Set, 2-1/4 Inch
    K&N Tapered Injector Air Filter Set, 2-1/4 Inch
    x
                

    These K&N tapered injection filters are designed from late-style Hilborn "tapered" Model Q with siamese stacks. Oval aluminum top plate measures 9" x 5-1/2". Total height is 6-3/4".

    • 2-1/4" I.D. flange
    • 2-3/16" injector bore
    • Available in set of four for Chevy
  • K&N Filters RD-0500 4 Inch Single Stack Injector Air Filter 2-1/8 Inch
    K&N Filters RD-0500 4 Inch Single Stack Injector Air Filter 2-1/8 Inch
    x
                For use with cut velocity stacks, or straight pieces of exhaust tubing. Flat rubber bases with molded-in velocity stack type radius and step for smooth bore down from element to tube. 

    Filters measure 3-1/2" diameter and 4" tall.

  • Henchcraft Air Box Filter
    $69.99
    $71.99
    New
    Henchcraft Air Box Filter
    x
                

    New from Henchcraft Chassis, these air box filters are designed for use with Mini Lightning Sprint ZX10, R1, or GSXR engines.

    • Large filter and plenum area
    • 2007-Up ZX10, R1, or GSXR
    • Replaceable filter for easy cleaning
  • K&N Filters RD-0720 6 Inch Single Stack Injector Air Filter 2-1/2 Inch
    K&N Filters RD-0720 6 Inch Single Stack Injector Air Filter 2-1/2 Inch
    x
                For use with cut velocity stacks, or straight pieces of exhaust tubing. Flat rubber bases come with molded-in velocity stack type radius and step for smooth bore down from element to tube. 

    Filters measure 3-1/2" diameter and 6" tall.


  • K&N Dual Injector Filters, 2-9/16 Inch, Set/4
    K&N Dual Injector Filters, 2-9/16 Inch, Set/4
    x
                

    These K&N straight injection filters are for fuel injection applications like Kinsler "straight" 3-piece, Pontiac and Chevrolet small block V8. Top plate measures 9" x 5-1/2", total height of filter 6-3/4".

  • K&N Filters E-2990 Micro/Mini/600 Air Filter
    K&N Filters E-2990 Micro/Mini/600 Air Filter
    x
                One piece oval filter measures 3.188" tall and 12.875" in length.  Rubber molding ensures proper seal. 
            
  • K&N Filters 61-2000 Flow Control Air Cleaner-Holley 2BBL w/ Choke Horn
    K&N Filters 61-2000 Flow Control Air Cleaner-Holley 2BBL w/ Choke Horn
    x
                

    A revolution in air cleaner technology! The Flow Control System utilizes a specially contoured base in combination with a unique lid, featuring a tongue or protrusion that reduces intake turbulance. The resulting smooth, laminar flow enhances cylinder filling with a typical 15+ HP increase on a 350 cubic inch engine. Includes the reusable K&N Filtercharger filter element for maximum airflow, filtration, and serviceability.

    Available for carbs with or without choke air horn. "With choke" means the choke horn is still on the carb. "Without choke" means the choke horn has been removed.

    • 4412 & 7448 Series carbs
    • Small blocks w/ 340-360hp see 15-17hp increase
    • Small blocks w/ 400-420hp see 20-22hp increase
    • 14" x 4"
    • Drop: 0.344"
    • Ht. Above Carb Flange: 3.75"
    • Off Set: 1"
    • Weight: 4.8 lb

    465-612000 Instructions (PDF)

  • K&N Filters RD-0600 4 Inch Single Stack Injector Air Filter 2-1/4 Inch
    K&N Filters RD-0600 4 Inch Single Stack Injector Air Filter 2-1/4 Inch
    x
                For use with cut velocity stacks, or straight pieces of exhaust tubing. Flat rubber bases with molded-in velocity stack type radius and step for smooth bore down from element to tube. 

    Filters measure 3-1/2" diameter and 4" tall.

  • K&N Filters 61-2040 Flow Control Air Cleaner, Rochester 2G 2 Barrel
    K&N Filters 61-2040 Flow Control Air Cleaner, Rochester 2G 2 Barrel
    x
                A revolution in air cleaner technology! The Flow Control System utilizes a specially contoured base in combination with a unique lid, featuring a tongue or protrusion that reduces intake turbulance. The resulting smooth, laminar flow enhances cylinder filling with a typical 15+ HP increase on a 350 cubic inch engine.

    Flow Control for Rochester 2-barrel

    • Clears the HEI distributor on the cast iron manifold
    • 14" x 4.5"
    • Drop: 0.625"
    • Ht. Above Carb Flange: 4.188"
    • Weight: 5.6 lb

    Includes the reusable K&N Filtercharger filter element for maximum airflow, filtration, and serviceability.

    465-612040 Instructions (PDF)

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