K&N 57S-2003 BMW E90/91/93 335I N54 ENGINE

Description K&N 57S-2003 BMW E90/91/93 335I N54 ENGINE

The K&N Performance Airbox is engineered to significantly reduce air flow restriction while smoothing and straightening air flow. By replacing the restrictive factory air filter and air box, the engine is able to draw in more air compared to the original assembly. Increased airflow results in more usable power and improved acceleration across the engine's RPM range.

The fully enclosed injection molded air box connects directly to the factory air intake hose. A removable lid allows for easy access to the filter for cleaning. Installation is straightforward, utilizing commonly available tools and the space of the previous air box. The system is designed for long-term durability and is supported by K&N's No-Hassle Lifetime Limited Warranty. Some 57S Series Performance Airboxes comply with the latest TUV emissions and sound regulations. Refer to the K&N catalog or website for specific vehicle applications and TUV status.

• Increases horsepower
• Designed to improve torque and acceleration
• Replaces entire factory air box and air filter system
• Washable and reusable lifetime air filter

Specifications:

• Estimated Horsepower Gain: 9.9 HP @ 3200 RPM
• Replacement Filter: RU-5293
• Air Filter Color: Red
• Air Filter Material: Cotton Gauze
• Air Filter Outlet Shape: Round
• Clamps Included: No Clamps Required
• Clamp Material: No Clamps Required
• Clamp Style: No Clamps Required
• Couplers Included: Not Required
• Type: Gen II
• Product Style: 57i Series International Kits
• Intake Pipe Color / Finish: Black
• Intake Pipe Material: High-Density Cross-Linked Polyethylene
• Street Legal In All US States: Not legal for sale or use in California on any pollution controlled motor vehicle.
• TUV Approved (Europe): No
• Weight: 7 lb (3.2 kg)
• Product Box Height: 12.5 in (318 mm)
• Product Box Length: 18.25 in (464 mm)
• Product Box Width: 18.25 in (464 mm)
• California Restricted: Not legal for sale or use in California
• Mounting Hardware Included: Yes
• Warranty: No-Hassle Lifetime Limited