K&N Replacement Air Filter — Fits 1988-1994 Audi/BMW

SKU: KNN33-2573
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About K&N Engineering K&N has been the world's leader in ...Read More

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Sale price$64.99
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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 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 Audi and BMW

Elevate the performance of your Audi V8 Quattro or BMW 535i, 735i, or 735iL with the K&N 33-2573 High-Flow Replacement Air Filter. This premium filter is engineered for a direct fit into the factory air box of select models from 1988 to 1994, providing a simple yet highly effective upgrade for enthusiasts seeking improved engine breathing and power.

Unleash Superior Airflow and Power

The K&N 33-2573 utilizes K&N's signature layered, oiled cotton media, a design optimized to allow maximum airflow into the engine while ensuring exceptional filtration of airborne contaminants. By facilitating a greater volume of air, this filter contributes to increased horsepower, torque, and overall acceleration, delivering a more dynamic driving experience.

Long-Term Value and Reliability

Invest in a performance upgrade that lasts. The K&N 33-2573 is designed to be washable and reusable, meaning it can be cleaned and re-oiled for the entire lifespan of your vehicle. This offers significant long-term cost savings compared to disposable filters and supports a more sustainable maintenance approach. K&N's confidence in this product is backed by their robust 10-Year/Million Mile Limited Warranty.

Key Features:

  • Direct-fit replacement for 1990-1994 Audi V8 Quattro (Base)
  • Direct-fit replacement for 1988-1993 BMW 535i (Base)
  • Direct-fit replacement for 1988-1992 BMW 735i (Base)
  • Direct-fit replacement for 1988-1992 BMW 735iL (Base)
  • Engineered for increased horsepower and acceleration
  • Features K&N's high-flow oiled cotton filtration
  • Washable and reusable for extended service life
  • Designed to last for the entire vehicle lifespan
  • Easy drop-in installation into the factory air intake system
  • Backed by K&N's 10-Year/Million Mile Limited Warranty

Upgrade your Audi or BMW with the K&N 33-2573 and experience the benefits of improved airflow and performance. Shop now at GGCRACING!

Vehicle Fitment

Years Make Model Trim
1990-1994 Audi V8 Quattro Base
1988-1993 BMW 535i Base
1988-1992 BMW 735i Base
1988-1992 BMW 735iL Base

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 Audi and BMW

Elevate the performance of your Audi V8 Quattro or BMW 535i, 735i, or 735iL with the K&N 33-2573 High-Flow Replacement Air Filter. This premium filter is engineered for a direct fit into the factory air box of select models from 1988 to 1994, providing a simple yet highly effective upgrade for enthusiasts seeking improved engine breathing and power.

Unleash Superior Airflow and Power

The K&N 33-2573 utilizes K&N's signature layered, oiled cotton media, a design optimized to allow maximum airflow into the engine while ensuring exceptional filtration of airborne contaminants. By facilitating a greater volume of air, this filter contributes to increased horsepower, torque, and overall acceleration, delivering a more dynamic driving experience.

Long-Term Value and Reliability

Invest in a performance upgrade that lasts. The K&N 33-2573 is designed to be washable and reusable, meaning it can be cleaned and re-oiled for the entire lifespan of your vehicle. This offers significant long-term cost savings compared to disposable filters and supports a more sustainable maintenance approach. K&N's confidence in this product is backed by their robust 10-Year/Million Mile Limited Warranty.

Key Features:

  • Direct-fit replacement for 1990-1994 Audi V8 Quattro (Base)
  • Direct-fit replacement for 1988-1993 BMW 535i (Base)
  • Direct-fit replacement for 1988-1992 BMW 735i (Base)
  • Direct-fit replacement for 1988-1992 BMW 735iL (Base)
  • Engineered for increased horsepower and acceleration
  • Features K&N's high-flow oiled cotton filtration
  • Washable and reusable for extended service life
  • Designed to last for the entire vehicle lifespan
  • Easy drop-in installation into the factory air intake system
  • Backed by K&N's 10-Year/Million Mile Limited Warranty

Upgrade your Audi or BMW with the K&N 33-2573 and experience the benefits of improved airflow and performance. Shop now at GGCRACING!

Vehicle Fitment

Years Make Model Trim
1990-1994 Audi V8 Quattro Base
1988-1993 BMW 535i Base
1988-1992 BMW 735i Base
1988-1992 BMW 735iL Base

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.

Watch in action

K&N High-Flow Replacement Air Filter for Audi and BMW

Elevate the performance of your Audi V8 Quattro or BMW 535i, 735i, or 735iL with the K&N 33-2573 High-Flow Replacement Air Filter. This premium filter is engineered for a direct fit into the factory air box of select models from 1988 to 1994, providing a simple yet highly effective upgrade for enthusiasts seeking improved engine breathing and power.

Unleash Superior Airflow and Power

The K&N 33-2573 utilizes K&N's signature layered, oiled cotton media, a design optimized to allow maximum airflow into the engine while ensuring exceptional filtration of airborne contaminants. By facilitating a greater volume of air, this filter contributes to increased horsepower, torque, and overall acceleration, delivering a more dynamic driving experience.

Long-Term Value and Reliability

Invest in a performance upgrade that lasts. The K&N 33-2573 is designed to be washable and reusable, meaning it can be cleaned and re-oiled for the entire lifespan of your vehicle. This offers significant long-term cost savings compared to disposable filters and supports a more sustainable maintenance approach. K&N's confidence in this product is backed by their robust 10-Year/Million Mile Limited Warranty.

Key Features:

  • Direct-fit replacement for 1990-1994 Audi V8 Quattro (Base)
  • Direct-fit replacement for 1988-1993 BMW 535i (Base)
  • Direct-fit replacement for 1988-1992 BMW 735i (Base)
  • Direct-fit replacement for 1988-1992 BMW 735iL (Base)
  • Engineered for increased horsepower and acceleration
  • Features K&N's high-flow oiled cotton filtration
  • Washable and reusable for extended service life
  • Designed to last for the entire vehicle lifespan
  • Easy drop-in installation into the factory air intake system
  • Backed by K&N's 10-Year/Million Mile Limited Warranty

Upgrade your Audi or BMW with the K&N 33-2573 and experience the benefits of improved airflow and performance. Shop now at GGCRACING!

Vehicle Fitment

Years Make Model Trim
1990-1994 Audi V8 Quattro Base
1988-1993 BMW 535i Base
1988-1992 BMW 735i Base
1988-1992 BMW 735iL Base

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