MST Performance Toyota Supra (A90)/BMW Z4 B58 Air Intake Kit

MST Performance Air Intake Kit – Toyota Supra A90 & BMW Z4 (B58 3.0T Engine)

The MST Performance air intake kit is a well-regarded upgrade for the Toyota GR Supra (A90) and BMW Z4, both of which share the same 3.0-litre turbocharged B58 engine. It replaces the standard airbox with a more efficient intake system, allowing the turbocharger to draw in a greater volume of cold, dense air. The result is improved throttle response, a more satisfying induction sound, and measurable power gains on both standard and already-tuned vehicles.

The factory airbox on these cars is designed with noise reduction and emissions compliance in mind, which can restrict airflow. This kit removes that restriction, giving the turbo a cleaner, straighter path to breathe through.

What Are the Performance Benefits?

Dyno testing has shown maximum gains of 12-14bhp, though results will vary depending on the individual vehicle and any existing modifications. On a standard car, this is a meaningful gain. On a tuned car, it supports and complements any ECU (engine control unit – the car’s engine management computer) remapping work already carried out, ensuring the engine can take full advantage of any increased fuelling or boost.

What’s Included in the Kit?

• Black powder-coated heat shield – helps keep hot engine bay air away from the intake
• Black powder-coated 4-inch aluminium inlet pipe
• 4-inch red dry pleated performance filter – easy to clean and maintain, no oiling required
• Silicone joiner coupler
• Full hardware fitting kit with step-by-step instructions

The dry pleated filter is a practical choice for everyday use. Unlike oiled filters, it requires no special treatment during servicing and is straightforward to clean and refit.

Build Quality

MST Performance are known for producing intake kits that use solid, well-finished components. The powder-coated pipework gives a clean look under the bonnet and offers good resistance to heat and corrosion over time. This is not a budget, flimsy kit – the fitment is designed to be precise and the finish is to a standard you would expect from a dedicated performance brand.

This kit is designed specifically for the Toyota GR Supra A90 and BMW Z4 models fitted with the B58 3.0T 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 and year before purchasing.