Cold Air Intake for BMW M140i M240i 340i (2016-2019) 3.0L Engine

High-Flow Cold Air Induction System for 2016-2019 BMW 1/2/3/4 Series (B58 Engine)

Replaces the restrictive factory air box with a high-velocity 3.5-inch induction system to lower intake air temperatures and improve turbocharger spool-up on the B58 platform.

The Stock BMW B58 Intake Restriction

The factory intake system in the M140i, M240i, and 340i is engineered primarily for NVH (Noise, Vibration, and Harshness) reduction rather than maximum volumetric efficiency. The OEM corrugated plastic piping and baffled airbox create internal air turbulence, which disrupts laminar flow before it reaches the turbo compressor wheel. Furthermore, the stock closed-box design is prone to heat soak during spirited driving or track sessions; as under-hood temperatures rise, the density of the intake air decreases, forcing the DME (Digital Motor Electronics) to pull ignition timing and reduce boost to prevent detonation. This results in a noticeable loss of power and throttle response.

The Engineering Solution

This induction kit provides a direct path for high-velocity air, utilizing a 3.5-inch diameter mandrel-bent intake tract and a high-surface-area cone filter. The oversized synthetic filter is washable and reusable, offering superior filtration while significantly reducing pressure drop compared to the stock paper element. To combat thermal transfer, the system includes a precision-cut heat shield that isolates the intake from the radiant heat generated by the engine block and exhaust manifold. By delivering a cooler, denser oxygen charge to the B58 engine, this system achieves dyno-verified gains of 10-12 hp. The kit is designed for a bolt-on installation, utilizing factory mounting points to ensure long-term durability under high-vibration conditions.

Technical Specifications

Compatibility

• BMW B58 2016-2019 3.0L M140i F20
• BMW B58 2016-2019 3.0L M240i F22 F23
• BMW B58 2016-2019 3.0L M340i F30 F34
• BMW B58 2016-2018 3.0L 340i F30

The BMW Precision Caliber

The B58 engine is a highly sensitive platform that requires consistent airflow data for optimal tuning. This intake system is engineered to maintain factory mass airflow (MAF) sensor scaling, ensuring increased performance and an aggressive induction note without the risk of Check Engine Lights (CEL) or lean-run conditions.