K&N Universal Clamp-On Air Filter — Oval 4 in Flange

SKU: BBWQ_RC-5178
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Sale price$146.99
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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

K&N engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full K&N lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

Universal Performance Air Filtration

Maximize your engine's potential with the K&N Universal Clamp-On Air Filter (RC-5178). Designed for custom intake systems and high-performance applications, this oval air filter provides the high-flow characteristics that K&N is world-famous for, ensuring your engine gets the air it needs to produce maximum power and torque.

Technical Specifications

  • Flange Diameter: 4 inches
  • Shape: Oval
  • Top Dimensions: 9" x 5.375"
  • Bottom Dimensions: 10.25" x 7.188"
  • Height: 7.875 inches
  • Media: Washable, reusable oiled cotton gauze

The RC-5178 is built to last, featuring a sturdy rubber flange and high-quality steel mesh that protects the filter media. The multi-layered cotton gauze is designed to trap contaminants while allowing for superior airflow compared to standard paper filters. Because it is washable and reusable, you can simply clean and re-oil it whenever necessary, making it a smart, long-term investment for any performance build. This universal filter is perfect for custom cold air intakes, turbo setups, or any application requiring a high-capacity 4-inch flange connection. Its oval shape is ideal for tight engine bays where space is at a premium, allowing you to maximize surface area for better filtration. Whether you are building a street machine or a track-focused beast, K&N delivers the reliability and performance you demand. Upgrade your intake system today with the best in the industry at GGCRACING.

Product Details

Product Description
Part Numbers
Sizing & Fit

About K&N

K&N engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full K&N lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

Universal Performance Air Filtration

Maximize your engine's potential with the K&N Universal Clamp-On Air Filter (RC-5178). Designed for custom intake systems and high-performance applications, this oval air filter provides the high-flow characteristics that K&N is world-famous for, ensuring your engine gets the air it needs to produce maximum power and torque.

Technical Specifications

  • Flange Diameter: 4 inches
  • Shape: Oval
  • Top Dimensions: 9" x 5.375"
  • Bottom Dimensions: 10.25" x 7.188"
  • Height: 7.875 inches
  • Media: Washable, reusable oiled cotton gauze

The RC-5178 is built to last, featuring a sturdy rubber flange and high-quality steel mesh that protects the filter media. The multi-layered cotton gauze is designed to trap contaminants while allowing for superior airflow compared to standard paper filters. Because it is washable and reusable, you can simply clean and re-oil it whenever necessary, making it a smart, long-term investment for any performance build. This universal filter is perfect for custom cold air intakes, turbo setups, or any application requiring a high-capacity 4-inch flange connection. Its oval shape is ideal for tight engine bays where space is at a premium, allowing you to maximize surface area for better filtration. Whether you are building a street machine or a track-focused beast, K&N delivers the reliability and performance you demand. Upgrade your intake system today with the best in the industry at GGCRACING.

Product Details

Product Description

About K&N

K&N engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full K&N lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

Universal Performance Air Filtration

Maximize your engine's potential with the K&N Universal Clamp-On Air Filter (RC-5178). Designed for custom intake systems and high-performance applications, this oval air filter provides the high-flow characteristics that K&N is world-famous for, ensuring your engine gets the air it needs to produce maximum power and torque.

Technical Specifications

  • Flange Diameter: 4 inches
  • Shape: Oval
  • Top Dimensions: 9" x 5.375"
  • Bottom Dimensions: 10.25" x 7.188"
  • Height: 7.875 inches
  • Media: Washable, reusable oiled cotton gauze

The RC-5178 is built to last, featuring a sturdy rubber flange and high-quality steel mesh that protects the filter media. The multi-layered cotton gauze is designed to trap contaminants while allowing for superior airflow compared to standard paper filters. Because it is washable and reusable, you can simply clean and re-oil it whenever necessary, making it a smart, long-term investment for any performance build. This universal filter is perfect for custom cold air intakes, turbo setups, or any application requiring a high-capacity 4-inch flange connection. Its oval shape is ideal for tight engine bays where space is at a premium, allowing you to maximize surface area for better filtration. Whether you are building a street machine or a track-focused beast, K&N delivers the reliability and performance you demand. Upgrade your intake system today with the best in the industry at GGCRACING.

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