MAF Air Intake Tube Pair for BMW 650i (2013-2017) 4.4L

Billet Aluminum MAF Air Intake Tube Pair for 2013-2017 BMW 6 Series (F06/F12/F13)

What it Does: The MAF Air Intake Tube Pair replaces restrictive factory intake housings on the 2013-2017 BMW 650i to deliver smooth, laminar airflow across both mass air flow sensors for stabilized fuel trims and reduced turbo inlet restriction.

The Stock BMW 6 Series Intake Restriction

Factory intake plumbing on the twin-turbocharged N63/N63TU engine relies on molded plastic housings and corrugated ducting positioned directly above intense cylinder-head heat. Over time, repeated thermal cycles embrittle the OEM composite material, risking vacuum leaks and hairline cracks around the sensor boss. Furthermore, internal plastic seams and sudden diameter transitions disrupt the air velocity profile directly ahead of the metering element. This turbulence introduces signal noise into the engine management system, leading to erratic air-fuel ratio corrections and restricted volumetric efficiency at high engine speeds.

The Engineering Solution

Engineered from lightweight aluminum with a uniform 3-inch (76mm) outer diameter, this matched pair provides a continuous, low-friction airflow path designed for dual-bank turbo setups. Each housing features a dedicated CNC-machined MAF sensor bung TIG-welded to exact OEM tolerances, seating the factory sensors at the correct immersion depth without adapters or silicone sealants. The compact 4.7-inch (120mm) footprint integrates directly into tight engine bays using standard 3-inch couplers, while a chemical-resistant gloss black anodized finish safeguards against underhood heat soak, oxidation, and oil vapor degradation.

What's Included

• 2 x 3" (76mm) Aluminum MAF Air Intake Tubes
• 4 x MAF Sensor Mounting Screws

Technical Specifications

Compatibility

• 2013-2017 BMW 650i Gran Coupe (F06) 4.4L N63 V8
• 2013-2017 BMW 650i Convertible (F12) 4.4L N63 V8
• 2013-2017 BMW 650i Coupe (F13) 4.4L N63 V8
• 2013-2017 BMW 650i xDrive (F06, F12, F13) 4.4L N63 V8

Frequently Asked Questions & Fitment Warnings

Does this fit the F06/F12/F13 6 Series?

Yes, this is a direct fit for the 2013-2017 BMW 6 Series equipped with the N63 4.4L twin-turbo V8 engine.

Are new mass air flow sensors included with these tubes?

No, these housings are designed to reuse your original factory BMW MAF sensors, which transfer directly using the included mounting hardware.

The BMW Calibration Standard

Precision German twin-turbo platforms demand uncompromised intake metering; these billet-welded housings preserve OEM sensor indexing to ensure factory-calibrated fuel trims and fault-free operation under heavy boost.