K&N 09-10 BMW 523i 3.0L-L6 Drop In Air Filter 'Fuel Pump' System also features Boryla's Polyphonic

System also features Boryla's Polyphonic Harmonizer Technology which utilizes patented units that contain pipes of different diameters and lengths to create multiple exhaust notes that harmonize to deliver a clean

For a stunning finish

while it is in liquid state

1997-2004 Chevrolet Corvette (C5)/ Corvette Z06 (C5) 5

BRAND: SR1 PERFORMANCE

K&N 09-10 BMW 523i 3.0L-L6 Drop In Air Filter 'Fuel Pump' System also features Boryla's PolyphonicK&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 10 Year Million Mile Limited Warranty. K&N drop in replacement filters are designed to install easily into your