The ECS XAS - VW Golf / GTI / Jetta Cold Air Intake Systems do just that and more. By completely replacing the restrictive OE air box and intake snorkel with a mandrel bent 70mm (approx 3") diameter aluminum pipe finished in either a bright hand polish black white Sparkle Red Sparkle Blue yellow or silver paint. Routed down into an open area within the front bumper where cool outside air is drawn in through a serviceable cone filter. External air drawn from outside is on average 30-60°F cooler than air within the engine bay.
Increased air density and reduced temperatures are accurately measured by the car's computer through the use of a highly sensitive air mass sensor. The computer can then add more fuel to achieve the proper air/fuel mixture resulting in a bigger more powerful burn creating additional power.
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