BMW 328Xi Performance and Racing Products

K&N washable, reusable High-Flow Air Filters feature a state-of-the-art design of layered, oiled cotton media engineered to improve airflow and capture contaminants, and are designed to provide an increase in horsepower. Each performance air filter is reusable, engineered to last for the entire lifespan of your vehicle, and backed by K&N’s No-Hassle Lifetime Limited Warranty. K&N drop-in replacement filters are designed to install easily into your factory air box. Upgrade today and start enjoying superior airflow and superior performance from K&N’s most popular product!

Product Features:

• ENGINEERED POWER: State-of-the-art air filter media is designed to increase horsepower and acceleration as well as improve overall engine performance
• RUGGED CONSTRUCTION: K&N Air Filters are manufactured with durable, premium materials and state-of-the-art construction methods to last a lifetime
• 4 LAYERS OF PROTECTION: Multiple layers of premium cotton gauze treated with a specially-designed tacking agent work together to create an intricate mesh of engine filter media that is designed to block and trap harmful contaminants
• CLEAN ONCE EVERY 5 YEARS: Engine air filter only needs cleaning every 75,000 miles under normal highway driving conditions (5 years based on the average miles driven per year of 15,000 miles)
• REUSABLE K&N FILTER SAVES YOU MONEY: A K&N washable, reusable air filter will save you up to $125 vs. purchasing multiple disposable filters (compared to MSRP in USD of corresponding OE filters for 200,000 miles of highway driving)
• ULTIMATE LONGEVITY: No-hassle lifetime limited warranty on stock replacement K&N air filters- limitations apply
• EASY INSTALLATION: K&N Air Filters are pre-oiled and ready to drop into your factory air box- they are one of the easiest and most cost-effective vehicle upgrades for quick performance gains
• REDUCES WASTE: Over 200 million disposable air filters and their packaging waste wind up in landfills each year- reusable filters help reduce waste in our landfills

This Stage 2 Sealed Intake produces 12HP, 15LBS. x FT. of torque and outflows the factory intake by 56. This sealed air intake system features a washable/reusable 6 inch conical air filter with inverted top that improves airflow for increased horsepower, torque and throttle response. The air filter is constructed with 100 polyurethane for long life and multiple cleaning cycles. The sealed housing features two auxiliary air inlet ducts for increased airflow. To finish off your underhood appearance, an attractive vacuum formed ABS plastic cover with carbon fiber finish is used to provide easy access to the filter for servicing and an aggressive look. To complete this system, a dyno tuned molded plastic intake tube with velocity stack adapter replaces the stock intake tract and directs air flow with improved volumetric efficiency for maximum intake velocity

Product Features:

• Uses Pro 5R Air Filter For Maximum Air Flow
• Rotomolded Plastic Tube
• 56% cfm Flow Gain
• Improved Throttle Response

Sealed, molded plastic or aluminum cover provides factory style with less intake noise than open systems. Our specially engineered air box openings pull cold air from outside the engine compartment increasing engine efficiency and producing greater performance gain. The cross-linked polypropylene rotomolded plastic air box replaces restrictive stock air box and ensures a consistent supply of cold fresh air; built-in ram scoop forces cold, outside air to filter. Precision designed molded plastic intake tube maximizes airflow volume and speed for optimum power gains. 360 degree flow, washable and reusable, limited lifetime filters are high flow and high performance.

Product Features:

• Uses Pro DRY S Air Filter For Maximum Convenience
• Rotomolded Plastic Tube For Maximum Air Flow
• 48% cfm Flow Gain
• Improved Throttle Response

The aFe Stage 2 cold air intake system produces up to 10HP and 12lbs. x ft. torque while outflowing the factory intake by up to 20. This intake includes a highly engineered heatshielded housing with a one-piece intake tube. Handling filter duties is the five layered, progressively finer mesh cotton gauze, oiled Pro 5R washable/reusable, 360 degree inverted top radial flow air filter that provides maximum filtration and high flow. The polished aluminum intake tube is engineered for improved volumetric efficiency and maximum performance while lowering Intake Air Temps (I.A.T). Utilizing factory mounting points, this system provides a hassle free installation.

Product Features:

• Uses Pro DRY S Air Filter For Maximum Air Flow
• Rotomolded Plastic Tube
• 56% cfm Flow Gain
• Improved Throttle Response