K&N Universal Round Air Filter — 9in OD, 7-1/2in ID, 4in Height

SKU: KNNE-3640
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Car Wheel Size Chart

Wheel Diameter (inches) Tire Width (mm) Aspect Ratio Rim Width (inches)
14185655.5
15195606.0
16205556.5
17215507.0
18225457.5
19235408.0
20245358.5

Note: Wheel and tire sizes vary by car make and model. Always consult your vehicle’s manufacturer for exact specifications.

How to Read Tire Size

Example: 225/45R17 means:

  • 225 = Tire width in mm
  • 45 = Aspect ratio (height as % of width)
  • R17 = Rim diameter in inches

Product Details

Product Description
Part Numbers
Sizing & Fit

About K&N Engineering

K&N has been the world's leader in washable, reusable performance air filters since 1969. From the legendary cone filter to complete cold-air intake systems, K&N's cotton-gauze element delivers more airflow than paper while staying serviceable for the life of the vehicle.

Universal Performance Airflow: K&N 4-Inch Height Round Air Filter

Enhance your vehicle's performance with the K&N Universal Round Air Filter. This versatile filter is designed to provide maximum airflow for a variety of applications, featuring a 9-inch outer diameter (OD), a 7-1/2 inch inner diameter (ID), and a 4-inch height. Its universal design makes it an excellent choice for custom installations, performance modifications, or replacing worn-out filters on a wide range of vehicles.

Superior Filtration and Lasting Efficiency

Constructed with K&N's renowned layered, oiled cotton media, this air filter ensures exceptional airflow, leading to increased horsepower and acceleration. Simultaneously, it provides robust filtration, capturing dirt and debris to protect your engine from damage. Engineered for longevity, the filter is washable and reusable, allowing you to clean and re-oil it for sustained performance over many miles. This makes it a cost-effective and environmentally friendly option for performance enthusiasts.

  • Type: Universal Air Filter
  • Shape: Round
  • Dimensions: 9" Outer Diameter (OD), 7.5" Inner Diameter (ID), 4" Height
  • Material: High-flow, oiled cotton gauze for optimal airflow and filtration
  • Performance: Boosts horsepower and acceleration
  • Durability: Washable and reusable for extended life
  • Warranty: Backed by K&N's 10-Year/Million Mile Limited Warranty
  • Application: Suitable for custom air intake systems and universal fitment needs

Ensure your engine receives the clean, unrestricted air it needs to perform at its peak. The K&N Universal Round Air Filter combines performance, durability, and value. Find this essential component and other performance upgrades at GGCRACING.

Product Details

Product Description
Part Numbers
Sizing & Fit

About K&N Engineering

K&N has been the world's leader in washable, reusable performance air filters since 1969. From the legendary cone filter to complete cold-air intake systems, K&N's cotton-gauze element delivers more airflow than paper while staying serviceable for the life of the vehicle.

Universal Performance Airflow: K&N 4-Inch Height Round Air Filter

Enhance your vehicle's performance with the K&N Universal Round Air Filter. This versatile filter is designed to provide maximum airflow for a variety of applications, featuring a 9-inch outer diameter (OD), a 7-1/2 inch inner diameter (ID), and a 4-inch height. Its universal design makes it an excellent choice for custom installations, performance modifications, or replacing worn-out filters on a wide range of vehicles.

Superior Filtration and Lasting Efficiency

Constructed with K&N's renowned layered, oiled cotton media, this air filter ensures exceptional airflow, leading to increased horsepower and acceleration. Simultaneously, it provides robust filtration, capturing dirt and debris to protect your engine from damage. Engineered for longevity, the filter is washable and reusable, allowing you to clean and re-oil it for sustained performance over many miles. This makes it a cost-effective and environmentally friendly option for performance enthusiasts.

  • Type: Universal Air Filter
  • Shape: Round
  • Dimensions: 9" Outer Diameter (OD), 7.5" Inner Diameter (ID), 4" Height
  • Material: High-flow, oiled cotton gauze for optimal airflow and filtration
  • Performance: Boosts horsepower and acceleration
  • Durability: Washable and reusable for extended life
  • Warranty: Backed by K&N's 10-Year/Million Mile Limited Warranty
  • Application: Suitable for custom air intake systems and universal fitment needs

Ensure your engine receives the clean, unrestricted air it needs to perform at its peak. The K&N Universal Round Air Filter combines performance, durability, and value. Find this essential component and other performance upgrades at GGCRACING.

Product Details

Product Description

About K&N Engineering

K&N has been the world's leader in washable, reusable performance air filters since 1969. From the legendary cone filter to complete cold-air intake systems, K&N's cotton-gauze element delivers more airflow than paper while staying serviceable for the life of the vehicle.

Universal Performance Airflow: K&N 4-Inch Height Round Air Filter

Enhance your vehicle's performance with the K&N Universal Round Air Filter. This versatile filter is designed to provide maximum airflow for a variety of applications, featuring a 9-inch outer diameter (OD), a 7-1/2 inch inner diameter (ID), and a 4-inch height. Its universal design makes it an excellent choice for custom installations, performance modifications, or replacing worn-out filters on a wide range of vehicles.

Superior Filtration and Lasting Efficiency

Constructed with K&N's renowned layered, oiled cotton media, this air filter ensures exceptional airflow, leading to increased horsepower and acceleration. Simultaneously, it provides robust filtration, capturing dirt and debris to protect your engine from damage. Engineered for longevity, the filter is washable and reusable, allowing you to clean and re-oil it for sustained performance over many miles. This makes it a cost-effective and environmentally friendly option for performance enthusiasts.

  • Type: Universal Air Filter
  • Shape: Round
  • Dimensions: 9" Outer Diameter (OD), 7.5" Inner Diameter (ID), 4" Height
  • Material: High-flow, oiled cotton gauze for optimal airflow and filtration
  • Performance: Boosts horsepower and acceleration
  • Durability: Washable and reusable for extended life
  • Warranty: Backed by K&N's 10-Year/Million Mile Limited Warranty
  • Application: Suitable for custom air intake systems and universal fitment needs

Ensure your engine receives the clean, unrestricted air it needs to perform at its peak. The K&N Universal Round Air Filter combines performance, durability, and value. Find this essential component and other performance upgrades at GGCRACING.

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