K&N Engineering 57S-2003 Performance Airbox for BMW 335i N54

The K&N Performance Airbox is designed to dramatically reduce air flow restriction as well as smooth and straighten air flow. Replacing the restrictive factory air filter and air box allows your engine to inhale more air than with the factory air filter assembly. More air means more usable power and acceleration throughout the engine's RPM range. A fully enclosed injection molded air box connects to the factory air intake hose. The removable lid provides easy access to the filter when cleaning is required. This performance air box is relatively easy to install. The required tools are commonly available and it uses the previous air box space. These air box systems are built to last for the life of your vehicle and they're backed by K&N's No-Hassle Lifetime Limited Warranty. Some K&N 57S Series Performance Airboxes are compliant with the latest TUV emissions and sound regulations. Check the K&N catalog or website for vehicle applications and specific TUV status for each vehicle and air intake. K&N's easy-to-install performance air box replaces the restrictive factory air filter and air intake housing delivering a power gain. This power boosting air intake comes with K&N's No-Hassle Lifetime Limited Warranty. Associated products: RU-5293 Universal Air Filter, 99-5000 Filter Care Service Kit Aerosol

• K&N No-Hassle Lifetime Limited Warranty

Upgrade the intake performance of your BMW with the K&N Engineering 57S-2003 Performance Airbox. Designed for vehicles equipped with the N54 engine, this enclosed airbox replaces the restrictive factory air filter and intake housing to help improve airflow, throttle response, acceleration, and usable power across the engine’s RPM range. The injection-molded airbox connects to the factory air intake hose and is designed to use the original airbox location for a straightforward installation.

The removable lid provides convenient access to the air filter for inspection and cleaning. This K&N Performance Airbox is engineered for long-term service and is backed by K&N’s No-Hassle Lifetime Limited Warranty. The system is not CARB approved, and emissions compliance may vary by application; verify local requirements before installation. This product is intended for the following applications: 2007 BMW 335i, 2008 BMW 335i, 2009 BMW 335i, and 2009 BMW 335i xDrive. Associated products include the K&N RU-5293 Universal Air Filter and 99-5000 Filter Care Service Kit Aerosol.

Product Overview

• Brand: K&N Engineering
• Part Number: 57S-2003
• Application: BMW 335i N54 engine
• Product Type: Enclosed performance airbox
• Filter Access: Removable airbox lid
• Installation: Uses the factory airbox location and intake hose
• Warranty: K&N No-Hassle Lifetime Limited Warranty
• Regulatory Status: Not CARB approved; check applicable emissions requirements

What's Included

One K&N Engineering 57S-2003 Performance Airbox system. Filter care products and associated replacement filters are sold separately.

Features:

• Reduced Airflow Restriction: Replaces the restrictive factory air filter and airbox to help the engine draw in more air.
• Improved Airflow Management: The enclosed injection-molded airbox helps smooth and straighten airflow into the engine.
• Enhanced Performance Response: Increased airflow can support improved acceleration, throttle response, and usable power throughout the RPM range.
• Serviceable Design: The removable lid provides easy access for filter inspection and cleaning, while the system is backed by K&N’s No-Hassle Lifetime Limited Warranty.

Fitments:
2007 BMW 335i Base
2008 BMW 335i Base
2009 BMW 335i Base
2009 BMW 335i xDrive Base

Air Freight Prohibited: false
Not Carb Approved: true
Carb Acknowledgement Required: true
Ltl Freight Required: false
Prop 65: Y
Part Type: automotive
Epa: N/A
Regular Stock: false
Units Per Sku: 1