RacingLine Cold Air Intake System – 8P Audi S3- FoamOne of our most popular products is the VWR Cold Air Intake System kit, enabling cold, dense air from outside the engine bay to reach the fuel metering unit more efficiently for the 2. 0 TFSI K04 engines. Some people forget that its whats inside a cold air intake that really matters. Our High Flow TriFoam triple layer construction is simply the best filtration material on the market, and is the key to the power gains achieved. Each filter is handmade