aFe 51-12912-C Magnum FORCE Stage-2 Cold Air Intake for 16-21 BMW B58 3.

Vehicle Fitment

• 2016-2018 BMW 340i (L6 3.0L turbo B58)
• 2016-2018 BMW 340i xDrive (L6 3.0L turbo B58)
• 2017-2019 BMW M140i (L6 3.0L turbo B58)
• 2017-2021 BMW M240i (L6 3.0L turbo B58)
• 2017-2021 BMW M240i xDrive (L6 3.0L turbo B58)
• 2017-2020 BMW 440i (L6 3.0L turbo B58)
• 2017-2020 BMW 440i xDrive (L6 3.0L turbo B58)
• 2017-2020 BMW 440i Gran Coupe & xDrive Gran Coupe (L6 3.0L turbo B58)

Features

• Magnum FORCE Stage-2 cold air intake engineered for improved engine breathing and turbo response
• Pro DRY S dry synthetic media air filter - washable and reusable with no oiling required
• Large 7" tall 360° radial filter increases surface area for enhanced airflow and service life
• CAD-designed roto-molded intake tube delivers smooth, high-velocity airflow
• Lightweight vacuum-formed plastic cover with carbon-fiber look and auxiliary air inlet enhances engine bay aesthetics
• Urethane plug included for blocking auxiliary inlet when desired
• Direct bolt-on installation - no cutting or drilling required
• Premium clamps, silicone couplings, and mounting hardware included

Specifications

• Part Number: 51-12912-C
• Brand: aFe Power
• Series: Magnum FORCE Stage-2
• Filter Type: Pro DRY S dry synthetic media
• Filter Size: ~7" tall 360° radial flow
• Estimated Airflow: ~400 CFM @ 7" H2O
• Estimated Performance Gains: Up to +9 HP and +10 lb-ft torque
• Intake Tube: CAD-designed roto-molded plastic
• Cover: Vacuum-formed plastic with carbon-fiber look
• Fitment: Direct-fit for BMW B58 3.0L turbo engines listed above
• Emissions: Not CARB exempt - not legal for sale/use in California or CARB-equivalent states

Included Components

• 1x Pro DRY S dry synthetic performance air filter
• 1x Roto-molded intake tube
• 1x Vacuum-formed carbon-fiber look cover
• Urethane auxiliary inlet plug
• Premium stainless-steel clamps
• Silicone couplings
• All required mounting hardware

Product Description

The aFe Power 51-12912-C Magnum FORCE Stage-2 Cold Air Intake System is a high-flow performance upgrade built for BMW models powered by the 3.0-liter B58 turbocharged inline-six engine - including the 340i, M140i, M240i, and 440i, with or without xDrive, from model years 2016 through 2021. This intake replaces the restrictive factory airbox and ducting with a performance-oriented design featuring a large Pro DRY S dry synthetic media filter and a CAD-designed roto-molded intake tube that outflows the stock intake for improved throttle response and overall engine efficiency.

A lightweight vacuum-formed plastic cover with a carbon-fiber look and auxiliary air inlet enhances under-hood style while maintaining excellent airflow characteristics. The included urethane plug allows for auxiliary inlet tuning, and the washable, reusable Pro DRY S filter reduces maintenance complexity. Estimated performance gains of up to approximately +9 HP and +10 lb-ft of torque help unlock additional power potential from your B58-powered BMW. Installation is straightforward with a direct bolt-on design that uses factory mounting locations - no cutting or drilling required. Note: this system is **not CARB exempt** and is **not legal for sale or use in California or other CARB-equivalent emissions-controlled states**.