K&N 57I-1000 Round Air Intake w/ Filter Kit for BMW 320i/323i/328i/325xi/325i

K&N 57i Generation II Induction Kits are built primarily for European vehicles. They come with K&N's Million Mile Limited Warranty™. These intake kits use only non-metallic rotationally molded tubes that can reduce air temperature and decrease intake sound over a metal tube. Restriction can exist BETWEEN an air filter and the engine reducing the benefit of a K&N Air Filter alone. The weakest link in the airflow chain robs a vehicle of its natural horsepower. Often that weak point is the factory air path leading to the engine. K&N Air Intake Kits virtually eliminate air path restriction by replacing the air filter and the entire air path to the engine. The aerodynamically engineered tube drives a massive amount of air into an engine, which translates into POWER. 57i Intakes are not legal for use in California and other US States adopting California emission standards.

Features:

Guaranteed to increase horsepower

Designed to improve throttle response and engine sound

Lasts up to 100,000 miles before service is required (depending on driving conditions)

Easy to install, usually in 90 minutes or less

Replaces entire factory air intake system

Washable and reusable lifetime air filter

K&N Million Mile Limited Warranty

Specifications:

Replacement Filter: RC-4550
Air Filter Color: Red
Air Filter Material: Cotton Gauze
Air Filter Outlet Shape: Round
Clamps Included: 3
Clamp Material: Steel
Clamp Style: Regular
Couplers Included: 1
Type: Gen II
Product Style: 57i Series International Kits
Air Filter Height: 6 in (152 mm)
Intake Pipe Color / Finish: Black
Intake Pipe Material: High-Density Cross-Linked Polyethylene
Street Legal In All US States: No
TUV Approved (Europe): No
Flange Inside Diameter: 4 in (102 mm)
Flange Length: 0.625 in (16 mm)
Flange Type: Centered
Height: 6 in (152 mm)
Base Outside Diameter: 5.375 in (137 mm)
Top Outside Diameter: 4.5 in (114 mm)
Top Style: Chrome
Weight: 6.5 lb (3 kg)
Air Filter Large End Diameter: 5.438 in (138 mm)
Product Box Height: 12 in (305 mm)
Product Box Length: 18 in (457 mm)
Product Box Width: 12 in (305 mm)
California Restricted: Not legal for sale or use in California
Warranty: 1,000,000 Miles/10 Year