Cold Air Intake for BMW 440i 340i M140i (2016-2020) 3.0L Turbo

High-Flow Cold Air Intake for 2016-2020 BMW 3 Series, 4 Series (B58/F-Series)

Replaces the restrictive factory air box with a sealed high-flow system and smooth-bore silicone induction tube to lower intake temperatures and maximize turbocharger efficiency on the B58 engine.

The Stock 3 Series & 4 Series Airflow Restriction

The factory BMW B58 intake assembly is engineered primarily for cabin acoustics (NVH) and emissions compliance, utilizing a baffled plastic housing that creates significant air resistance. Under high-load conditions, the stock corrugated plastic intake pipe induces turbulent airflow, disrupting the air's path to the turbocharger. Furthermore, the thin-walled OEM plastic box is highly susceptible to heat soak from the engine bay, which elevates Intake Air Temperatures (IATs) and causes the ECU to pull timing. This restriction limits the 3.0L twin-scroll turbo’s ability to pull the necessary volume for peak performance, resulting in delayed throttle response and power plateaus at high RPMs.

The Engineering Solution

This system integrates a high-flow, inverted-cone air filter within a precision-engineered sealed air box designed to interface directly with the OEM air scoop for a true ram-air effect. By forcing pressurized ambient air through a multi-layer silicone intake tube, internal turbulence is virtually eliminated, ensuring laminar flow directly to the turbo inlet. The heavy-duty silicone construction acts as a thermal barrier to prevent heat transfer from the engine block, while the increased surface area of the inverted cone filter provides gains of 10-15 horsepower and a significant increase in torque. This setup provides an aggressive, race-inspired induction note while maintaining factory-level filtration standards.

Technical Specifications

Compatibility

• 2016-2020 BMW 1 Series (M140i) F20 / F21
• 2016-2020 BMW 2 Series (M240i) F22
• 2016-2018 BMW 3 Series (340i) F30 / F31 / F34
• 2016-2020 BMW 4 Series (440i) F32 / F33 / F36
• Engine: B58 3.0L Turbocharged Inline-6

The BMW Precision Caliber

Engineered specifically for the F-Series B58 platform, this intake upgrade maintains the tight tolerances required for modern German engineering. It provides a significant boost in volumetric efficiency without the risk of triggering a Check Engine Light (CEL), offering the perfect balance between track-ready performance and daily-driver reliability. Note: Professional installation is highly recommended to ensure proper sensor calibration and airtight seals.