AFE Dual Filter Air Intake Kit BMW 135i & 335i & 535i 2007+ We used the AFE cold air intake in our 135i that competed in the 2008 EURO tuner GP Cup delivering great results in 100 degree + weather in our highly modified 1 series , helping us achieve the fastest lap time out of all the competitors. great power increase across the power-band as well as giving the engine bay an aggressive yet refined look, a must for any tuned 1 series, 3 series, 5 series twin turbo bmw Maximizes airflow for better acceleration and responsiveness Improved performance results in greater fuel efficiency Installs in less than 60 minutes using factory mounting points No cutting or drilling to engine compartment is required Replaces OE air filter with high flow high performance 360 degree radial flow air filter Washable/reusable air filter with the deepest pleats in the industry is the largest possible in the space allowed Replaces factory air box with a heat-blocking shield that seals to the hood Replaces factory intake tube with a custom-designed intake tube that accelerates airflow to the turbochargers.