MST Cold Air Intake (CAI) & Induction Kit for BMW M3 G80 / M4 G82 Competition (S58) 2021-On | High-Flow Intake System, 4 Inch Turbo Inlet Pipe, Dry Cone Filter | Dyno Proven +12-14 bhp | Bolt-On Airbox Upgrade

MST Air Induction System for BMW G-series M — unleash your S58’s potential with a high flow intake upgrade that delivers more power, sharper response and an addictive turbo soundtrack. This precision-built MST kit replaces the restrictive factory airbox on the BMW M3 G80 and BMW M4 G82 Competition, feeding the twin-turbo straight-six with cooler, denser air for real on-road gains and a premium OE-plus look under the bonnet.

Performance you can feel

• Independent testing has shown gains of up to 12 to 14 bhp depending on vehicle
• Quicker turbo spool and crisper throttle response for a more responsive drive
• Optimised air path and heat shielding for consistent intake temperatures
• Deep, purposeful induction note that enhances the M experience without drone
• Durable black powdercoated components for a factory-quality finish
• Dry pleated cone filter for maximum flow with easy maintenance and no oiling required

At MJ Modifications we have fitted and used this MST system on customer cars and our own vehicles. Feedback is consistently positive, with owners reporting smoother power delivery, stronger mid-range and a noticeable improvement in intake sound quality.

What’s included

• Black powdercoated heat shield assembly
• Black powdercoated 4 inch turbo inlet pipe
• High flow red dry element performance filter
• Quality silicone joiner and clamps
• Complete fitting hardware with clear instructions

Vehicle compatibility

• BMW M3 G80 Competition S58 2021 onward
• BMW M4 G82 Competition S58 2021 onward

Why upgrade your S58 intake

• Replaces the restrictive factory airbox with a high flow intake system designed for the S58
• Direct feed to the turbocharger via an enlarged 4 inch inlet for maximum airflow
• Improved breathing supports stock and tuned setups alike
• Enhanced engine sound adds drama without compromising refinement

Installation and fitting

This MST intake is a straightforward bolt-on upgrade with the supplied hardware and step-by-step guide. For professional installation, choose MJ Modifications in Warwickshire. Request a fitting quote at info@mjmodifications.co.uk.

Key points at a glance

• High flow air induction kit engineered for the S58 twin-turbo engine
• 4 inch turbo inlet pipe and heat shield for a cool, efficient air supply
• Dry performance filter for high airflow and simple upkeep
• Proven power increase of up to 12 to 14 bhp may vary by vehicle
• Premium look and fit to complement the G80 and G82 engine bays

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Note: Power and response improvements depend on vehicle condition and supporting modifications.