The restrictive factory air filter and air intake housing are replaced by the K&N Typhoon cold-air intake which is designed to pull in relatively cooler air and dramatically reduce air flow restriction by smoothing and straightening air flow.
K&N 69-9508T Performance 69 Series Typhoon Air Intake Kit for Audi A4/A5/A6
K&N 69-3537TS Performance 69 Series Typhoon Intake Kit w/ Filter for Escape/MKC
K&N 69-2026TTK Performance 69 Series Typhoon Intake Kit w/ Filter for Cooper S
K&N 69-4532TTK Performance 69 Series Typhoon Intake Kit for Buick Regal 2.0L
K&N 69-1212TS Performance 69 Series Typhoon Intake Kit for Accord/TLX 3.5L V6
K&N 69-7078TS Performance 69 Series Typhoon Intake Kit for G37/370Z/370Z 3.7L