MAF Housing Kit with stock sensor mount (and stainless fasteners) for 2.0T FSI engine, Custom Machined Aluminum unit with flow optimization countours on inside for max flow and HP. Flow area has a gradual ramp on each side to direct air smoothly through the MAF element. Outside is machined for standard 3" silicone connection with no-slip grooves for clamping. Flow tested to work equivalent to a 3" straight through pipe on the 2.0T FSI engine with stock turbo. Conforms to stock metering requirements to make the engine ECU happy at critical operating conditions. This MAF Housing is the same unit used on our 3" inlet pipe kit P/N: ATP-VVW-171