BMW 525xi Air Filter

K&N HIGH FLOW DIRECT FIT AIR FILTER, RED -- 50-state legal; Provides 1 to 4 h.p. power gain; 96 to 99 percent filtration efficiency; 1.125 in. height, 11.375 in. outside length, 9.125 in. outside width; Oiled element; Unique style; Made of multiple interwoven layers of surgical cotton gauze; Increases horsepower and acceleration while providing excellent filtration; Custom designed to fit into existing air box and features a drop-in design which means adding performance is simple; Provides high air flow with excellent filtration; Economical and environment friendly; Works with OEM vehicle electronics; Will last the life of your vehicle; Washable and reusable; Lasts up to 50,000-mile before cleaning is required depending on drive condition; With K&N's limited million mile warranty.

Fits the following 2006-2007 BMW 525xi submodels:

• 2006-2007: Base; 6 Cyl 3.0L;

HASTINGS PREMIUM AIR FILTER -- Up to 99 percent filtration efficiency; 11.59375 in. x 1.8125 in.; Panel style; This Air Filter is built to meet or exceed OE specifications; Features permapleat construction that forms dividers between pleats and prevents bunching for insured uniform air flow; Its heavy-duty radial seal gasket is formed from a special urethane compound that will not degrade under temperature extremes and even under changes in restriction or vibration; It has spiral glue binding for added pleat stability and flexible outer edges that allow deflection for easy insertion and removal in housings; Replaces BMW 13717521033; With Hastings' limited warranty.

Fits the following 2006-2007 BMW 525xi submodels:

• 2006-2007: Base; 6 Cyl 3.0L; "GAS, FI, N52"

BECK-ARNLEY AIR FILTER -- A High Quality, Direct-Fit OEM Replacement Air Filter

Fits the following 2006-2007 BMW 525xi submodels:

• 2006-2007: Base; 6 Cyl 3.0L;

Fits the following 2006-2007 BMW 525xi submodels:

• 2006-2007: All Submodels; All Engines;

Fits the following 2006-2007 BMW 525xi submodels:

• 2006-2007: All Submodels; All Engines;

AFE PRO 5R PERFORMANCE AIR FILTER, BLUE -- Increases air flow up to 24 percent; 98.6 percent filtration efficiency; Up to 550 CFM; Includes cleaning instruction; Oiled element; Panel style; Made of five layers of progressively finer medical-grade cotton gauze; Its 100 percent polyurethane construction withstands extreme engine temperature, significantly extending its service life; Features pleated depth loading media with large surface area that provides high flow, high dirt capacity, and high filtration efficiency; Eliminates the need for sealing gasket or grease through its progressive bump seal; It has washable and reusable media with the deepest pleats in the industry; Provides your engine with the largest amount of high-flowing cold air, giving you the greatest horsepower and torque gains; It exceeds the necessary protection of your average everyday driving; With AFE's limited lifetime warranty.

Fits the following 2006-2007 BMW 525xi submodels:

• 2006-2007: Base; 6 Cyl 3.0L; "GAS, FI, N52"

AFE PRO DRY S PERFORMANCE AIR FILTER, GREY -- Increases air flow up to 24 percent; 99.2 percent filtration efficiency; Up to 416 CFM; Includes cleaning instruction; Dry element; Panel style; Made of two layers of randomly porous synthetic fabric; Its 100 percent polyurethane construction withstands extreme engine temperature, significantly extending its service life; Features pleated depth loading media with large surface area that provides high flow, high dirt capacity, and high filtration efficiency; Eliminates the need for sealing gasket or grease through its progressive bump seal; It has washable and reusable media with the deepest pleats in the industry; Its oil free dry synthetic filtration media is the world's easiest-to-service performance air filter; Provides extended filter life in normal, everyday driving condition; An excellent choice for ease of maintenance; With AFE's limited lifetime warranty.

Fits the following 2006-2007 BMW 525xi submodels:

• 2006-2007: Base; 6 Cyl 3.0L; "GAS, FI, N52"

INJEN HIGH PERFORMANCE AIR FILTER -- 3 in. mouth diameter, 5 in. base, 5 in. tall, 4 in. top; Cotton gauze; Oiled element; Conical style; 40-pleat; Features black urethane body with red filter media; Provides excellent air flow and filtration; Washable and reusable; With Injen's limited lifetime warranty.

Fits the following 2006-2007 BMW 525xi submodels:

• 2006-2007: All Submodels; All Engines;

INJEN HIGH PERFORMANCE TAPERED AIR FILTER -- Black Urethane Body With Red Filter Media

Fits the following 2006-2007 BMW 525xi submodels:

• 2006-2007: All Submodels; All Engines;

INJEN HIGH PERFORMANCE AIR FILTER, RED -- 3 in. mouth diameter; 6 in. base; 5 in. tall; 5 in. top; Cotton gauze; Oiled element; Conical style; Features black urethane body with red filter media; Provides excellent air flow and filtration; Washable and reusable; With Injen's limited lifetime warranty.

Fits the following 2006-2007 BMW 525xi submodels:

• 2006-2007: All Submodels; All Engines;

INJEN HIGH PERFORMANCE AIR FILTER, RED -- 3.50 in. mouth diameter; 6.75 in. base; 5 in. tall; 5 in. top; Cotton gauze; Oiled element; Conical style; Features black urethane body with red filter media; Provides excellent air flow and filtration; Washable and reusable; With Injen's limited lifetime warranty.

Fits the following 2006-2007 BMW 525xi submodels:

• 2006-2007: All Submodels; All Engines;

INJEN HIGH PERFORMANCE AIR FILTER, RED -- 2.75 in. mouth diameter; 6 in. base; 5 in. tall; 5 in. top; Cotton gauze; Oiled element; Conical style; Features black urethane body with red filter media; Provides excellent air flow and filtration; Washable and reusable; With Injen's limited lifetime warranty.

Fits the following 2006-2007 BMW 525xi submodels:

• 2006-2007: All Submodels; All Engines;

INJEN HIGH PERFORMANCE AIR FILTER, RED -- 3 in. mouth diameter; 6 in. base; 5 in. tall; 4 in top; Cotton gauze; Oiled element; Conical style; 40-pleat; Features black urethane body with red filter media; Provides excellent air flow and filtration; Washable and reusable; With Injen's limited lifetime warranty.

Fits the following 2006-2007 BMW 525xi submodels:

• 2006-2007: All Submodels; All Engines;