K&N Engineering
K&N Replacement Air Filter for BMW R18 Series 2021-2024
K&N Replacement Air Filter for BMW R18 Series 2021-2024
K&N Replacement Air Filter for BMW R18 Series 2021-2024
K&N Replacement Air Filter for BMW R18 Series 2021-2024
K&N Replacement Air Filter for BMW R18 Series 2021-2024
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K&N Replacement Air Filter for BMW R18 Series 2021-2024K&N Replacement Air Filter for BMW R18 Series 2021-2024K&N Replacement Air Filter for BMW R18 Series 2021-2024K&N Replacement Air Filter for BMW R18 Series 2021-2024K&N Replacement Air Filter for BMW R18 Series 2021-2024
K&N Engineering

K&N Replacement Air Filter for BMW R18 Series 2021-2024

SKU: KNNBM-1821

About K&N Engineering K&N has been the world's leader in ...Read more

Price:
$73.99
730 ENTRIES10X
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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

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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.

Watch in action

K&N High-Flow Replacement Air Filter for BMW R18 Series

Elevate your BMW R18 riding experience with the K&N High-Flow Replacement Air Filter (Part Number BM-1821). This premium air filter is engineered to provide an increase in horsepower and acceleration by improving airflow to your engine while ensuring excellent contaminant capture. Designed as a direct replacement for your stock filter, installation is simple and hassle-free.

Key Features & Benefits:

  • Enhanced Airflow: The state-of-the-art layered, oiled cotton media design allows for increased air volume, contributing to better performance.
  • Superior Filtration: Effectively traps dirt and debris, protecting your R18's engine for its entire lifespan.
  • Washable & Reusable: This filter is designed to be cleaned and reused, offering exceptional long-term value and reducing waste.
  • Easy Installation: Installs directly into the factory air box, requiring no modifications.
  • Engineered for Performance: Provides a noticeable boost in power and throttle response for your BMW R18.

Vehicle Fitment:

This K&N air filter is compatible with the following BMW R18 models:

  • BMW R 18: 2021-2024
  • BMW R 18 100 Years: 2023
  • BMW R 18 B: 2022-2024
  • BMW R 18 Classic: 2021-2024
  • BMW R 18 First Edition: 2021
  • BMW R 18 Roc: 2023-2024
  • BMW R 18 Transcontinental: 2022-2024

Upgrade your BMW R18 with a K&N High-Flow Air Filter for improved performance and lasting engine protection. Get yours today at GGCRACING!

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.

Watch in action

K&N High-Flow Replacement Air Filter for BMW R18 Series

Elevate your BMW R18 riding experience with the K&N High-Flow Replacement Air Filter (Part Number BM-1821). This premium air filter is engineered to provide an increase in horsepower and acceleration by improving airflow to your engine while ensuring excellent contaminant capture. Designed as a direct replacement for your stock filter, installation is simple and hassle-free.

Key Features & Benefits:

  • Enhanced Airflow: The state-of-the-art layered, oiled cotton media design allows for increased air volume, contributing to better performance.
  • Superior Filtration: Effectively traps dirt and debris, protecting your R18's engine for its entire lifespan.
  • Washable & Reusable: This filter is designed to be cleaned and reused, offering exceptional long-term value and reducing waste.
  • Easy Installation: Installs directly into the factory air box, requiring no modifications.
  • Engineered for Performance: Provides a noticeable boost in power and throttle response for your BMW R18.

Vehicle Fitment:

This K&N air filter is compatible with the following BMW R18 models:

  • BMW R 18: 2021-2024
  • BMW R 18 100 Years: 2023
  • BMW R 18 B: 2022-2024
  • BMW R 18 Classic: 2021-2024
  • BMW R 18 First Edition: 2021
  • BMW R 18 Roc: 2023-2024
  • BMW R 18 Transcontinental: 2022-2024

Upgrade your BMW R18 with a K&N High-Flow Air Filter for improved performance and lasting engine protection. Get yours today at GGCRACING!

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