BMW B58 Performance Cold Air Intake Induction Kit - Direct-Fit Upper Airbox Replacement, OEM Lower Box Retained - Improved Turbo Sound & Throttle Response - Fits M140i M240i 340i 440i 540i 640i 740i 840i X3 M40i X4 M40i Z4 M40i

BMW B58 Intake System Upgrade - Upper Airbox Lid Replacement

Give your 3.0-litre straight-six the breathing it deserves. This B58 intake system replaces the top cover of the factory filter housing while keeping the original lower half in place, maintaining the OEM cold air feed and excellent heat shielding. The result is crisper accelerator response, louder turbo spool, more induction roar and a cleaner OEM-plus look under the bonnet.

Engineered for vehicles running the B58 petrol turbo, this direct-fit solution increases airflow over the restrictive stock lid and controls intake temperatures by retaining the factory lower box. If you are searching for a B58 air induction upgrade, BMW performance intake system, B58 airbox lid, B58 intake upgrade UK, or BMW turbo intake for daily use and spirited driving, this is the one to choose.

Key benefits

• Swaps the upper airbox cover for a freer-flowing design
• Keeps the standard lower housing for strong heat management and cold-air ducting
• Sharper pedal response and more vivid turbo sounds on boost and lift-off
• Neat factory-style presentation in the engine bay
• No tune required, no cutting, no permanent changes - easily returned to stock
• Built for the B58 platform for a hassle-free installation

Compatibility

Suits BMW models fitted with the B58 3.0 petrol turbo engine using the standard-style airbox, including:

• M140i F20 F21
• M240i F22 F23
• 340i F30 F31
• 440i F32 F33 F36
• 540i G30 G31
• 640i
• 740i
• 840i G15
• X3 M40i G01
• X4 M40i G02
• Z4 M40i G29

Unsure about fitment for your specific car or build year? Contact us and we will confirm compatibility before you order.

Real-world feedback

We run this intake on our own B58 projects and customer cars. Owners love the addictive whoosh and spool, the cleaner induction note and the snappier response without any unwanted drone. It is the sweet spot for an OEM-plus intake upgrade that improves character and drivability.

Installation

Simple bolt-on job with basic tools. No cutting, no drilling, no software changes. Prefer expert fitting? Book professional installation with MJ Modifications in Warwickshire - request a quote at info@mjmodifications.co.uk.

Why buy from MJ Modifications

We specialise in performance parts and B58 upgrades. Tried by us, praised by our customers, and supported by friendly advice before and after purchase.

What enthusiasts search for

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Please ensure your vehicle uses the B58 engine with the factory-style airbox before ordering. If in doubt, get in touch and we will help you verify.