An aFe Cold Air Intake System for your BMW M5 & M5 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 high quality 16 gauge 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: