BMW G29 Z4 M40i & Toyota GR Supra B58 Stage 2 Hardware Package

This great-value Stage 2 Hardware Package has been carefully assembled for BMW Z4 M40i and Toyota GR Supra models equipped with the B58 engine, providing all the essential supporting components required to unlock serious performance potential beyond 500bhp when paired with appropriate software calibration. Each component has been selected for its quality, precise fitment, and proven capability, ensuring reliable performance gains while retaining everyday usability. Designed specifically for OPF-equipped vehicles, this package forms an ideal foundation for a properly developed Stage 2 setup.

Key Features

• Complete Stage 2 hardware solution for B58-powered applications

• Substantially improved intake and exhaust flow

• High-quality, precision-engineered components

• Designed specifically for OPF-equipped vehicles

• Proven hardware combination capable of supporting 500bhp+ with suitable tuning

What’s Included

MST Intake System
The MST intake system for the BMW G29 Z4 and Toyota A90 Supra features a large 4" intake pipe, performance dry nanofibre air filter, and laser-cut heat shield, finished in a durable textured black powder coat. Designed to maximise airflow and reduce intake restriction, this system improves throttle response while delivering a more aggressive induction sound compared to the factory setup. Dyno testing on the B58 platform has shown gains of up to 12–14bhp, while retaining OEM mounting points and the standard turbo inlet pipe.

Scorpion B58 OPF Downpipe – 5" Diameter (Choice of Sports Cat or De-Cat)
This package includes your choice of Scorpion 5-inch diameter downpipe, available as either a high-flow sports catalytic version or a de-cat option. Both variants significantly reduce exhaust back pressure compared to the factory OPF-equipped downpipe, allowing the turbocharger to operate more efficiently and support higher power outputs. Precision-manufactured for exact fitment, these downpipes are a key requirement for any serious Stage 2 B58 build. The decat downpipe has slightly more flow and is less expensive but will definitely not pass vehicle emissions tests.

Scorpion Non-Resonated OPF Delete Midpipe
The Scorpion non-resonated OPF delete midpipe for the BMW G29 Z4 M40i and Toyota GR Supra further improves exhaust flow and delivers a sharper, more purposeful exhaust tone. Designed to integrate seamlessly with the Scorpion downpipe and factory rear exhaust sections, this midpipe completes the Stage 2 exhaust hardware setup.

Fitment Notes

• Designed for OPF-equipped vehicles only

• An engine management light is likely due to OPF and catalyst removal or modification

• Coding or custom ECU tuning is required to address OPF and catalyst-related fault codes

• Exhaust and emissions characteristics are altered

Compatibility

• BMW Z4 M40i (G29) – B58 engine

• Toyota GR Supra (A90) – B58 engine

Important Notice

This hardware package modifies factory emissions components and is intended for off-road use only.

Unless explicitly stated otherwise, all products sold by R44 Performance Limited are designated RACE ONLY and are solely for competition or off-road use limited to racing formally sanctioned by a recognized racing organization. Any other use, including recreational off-road use, may violate local, state, and Federal laws. R44 Performance Limited does not implicitly or explicitly confirm the legality of using any products it sells on public roads; that is entirely the responsibility of the consumer.

It is the responsibility of the customer to check with all federal, state local and environmental laws before ordering and installing a product. R44 Performance Limited is not responsible for any fees, fines or costs that a customer may incur as a result of failing to check with federal, state, local or environmental laws before ordering and installing a product.

We get a large number of custom orders and requests everyday, so as a result it is not always possible for us to keep every item in stock at all times in our warehouse. If you require the item urgently please contact our sales team here to check the stock before you make your purchase.

We totally understand if you're not certain a part will be compatible with your car, so we highly recommend contacting us here with your query. Our friendly sales team will then be in touch to confirm if this part is the correct part you are looking for.

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All of our products come with a standard warranty of 1-3 years. This is dependant on the type of product however. For more details please see our warranty page here.