MST Performance Audi A4/A5 (B9) 2.0 TFSI (with MAF) Air Intake Kit

MST Performance Air Intake Kit – Audi A4/A5 (B9) 2.0 TFSI (MST-AD-A403)

If you want more from your Audi A4 or A5, improving the way your engine breathes is one of the most effective first steps. This air intake kit from MST Performance replaces the restrictive standard airbox with a free-flowing setup designed to deliver cooler, denser air directly to the turbocharger – helping it work more efficiently and giving you a noticeable improvement in performance and throttle response.

This kit is designed for the Audi A4 and A5 B9 2.0 TFSI (40 TFSI) engine from 2015 onwards, on models fitted with a MAF sensor (Mass Air Flow sensor – a sensor that measures how much air enters the engine). Please use the vehicle lookup tool on this site or check the “Vehicle Fitment” tab to confirm this kit is correct for your specific model before purchasing.

What Does It Do?

The standard factory airbox is designed with cost and noise suppression in mind, not maximum performance. By replacing it with this MST kit, you allow a greater volume of cooler air to flow into the turbo. More air means better combustion, which translates into improved throttle response – the engine reacts more quickly when you press the accelerator – along with a more engaging induction sound under load.

MST Performance report dyno-tested gains of up to 12-14bhp on this kit. Results will vary depending on the individual vehicle, whether any other modifications are fitted, and driving conditions. On a tuned vehicle, the gains may be more pronounced as the engine is already pushing harder against the limits of the standard intake.

What’s Included?

• Black powder-coated heat shield – helps isolate the filter from underbonnet heat, keeping incoming air as cool as possible
• Black silicone inlet pipe – flexible, durable, and a direct replacement for the factory plastic pipework
• Red dry pleated performance air filter – easy to maintain and clean, no oiling required
• Full fitting hardware and step-by-step instructions

Why MST Performance?

MST Performance produce bolt-on intake systems engineered to fit precisely and perform reliably. All components in this kit are built to a consistent standard, and the inclusion of a heat shield sets it apart from basic cone filter replacements. The dry pleated filter design means servicing is straightforward – no messy oil treatments needed.

This kit suits the Audi A4 B9 and A5 B9 2.0 TFSI from 2015 onwards where a MAF sensor is fitted. Use the vehicle lookup tool on this site or refer to the Vehicle Fitment tab to confirm compatibility with your exact model and variant before ordering.