An aFe Cold Air Intake System for your BMW 135/335/535 is one of the easiest and most cost effective ways to increase your car's performance. The aFe cold air intake replaces your restrictive factory air box which allows for an increased air flow meaning more horsepower. Another feature of the intake is the 16 gauge powder coated steel heat shield. A heat shield makes sure that the intake doesn't use the hot air around your engine and only allows the intake to receive cooler air, which adds more power. Not only does power increase, but many have observed an increase in MPG. Give your BMW a boost in power while improving fuel economy with an AFE Cold Air Intake. aFe BMW Cold Air Intake Benefits: 27 horsepower gain on your N54 135, 335, or 535i 34 Ft./lbs of torque gainIncreased throttle response Incredible whooshing, growling sound Better fuel economy, usually a 1-2 MPG gain is observedNew look under your hood Washable/ reusable filter Installs in less than 45 minutes and uses factory mounting points Limited lifetime warranty This aFe Cold Air Intake fits the following BMW Vehicles: 2008+ 135i (E82/E88) 2008+ 535i/xi (E60/E61) 2007+ 335i/xi (E90/E91) 2007+ 335i/xi (E92/E93) aFe Cold Air Intakes are available with multiple filter types: AFE Pro Dry S Off-White Air Filter Average of 50% air flow over stock filter element 99.2% filtration AFE Pro 5 R (oiled) Blue Air Filter Average of 75% air flow over stock filter element 98.6% filtration aFe Cold Air Intake Installation Can usually be installed in under 45 minutes Uses factory mounting points No special tools required No cutting or drilling required Installation Guide Included C.A.R.B. Certified All aFe Air Intake Systems are C.A.R.B. certified or awaiting certification and 50 state legal.