The BMW M5 G90 is a beast straight from the factory, equipped with the powerful S68 twin-turbo V8 engine. But for true enthusiasts seeking to unleash its full potential, one upgrade stands out: the BMW M5 G90 downpipe.
What Is a Downpipe?
A downpipe is a section of exhaust piping that connects the turbochargers to the rest of the exhaust system. Upgrading this component, especially on turbocharged vehicles like the M5 G90, can significantly improve performance by reducing exhaust backpressure and allowing the turbos to spool more efficiently.
Why Upgrade to a Performance BMW M5 G90 Downpipe?
Upgrading to a high-performance BMW M5 G90 downpipe brings several key benefits:
1. Increased Horsepower and Torque
A less restrictive downpipe improves airflow, which directly boosts engine output. You can expect gains of 20–40 horsepower depending on your tune and supporting mods.
2. Enhanced Exhaust Sound
One of the most noticeable changes is the sound. A performance BMW M5 G90 downpipe unlocks a deeper, more aggressive tone, especially under hard acceleration.
3. Better Turbo Response
With improved exhaust flow, your turbos spool faster. This means quicker throttle response and more immediate power delivery.
4. Supports Future Modifications
Planning to go further with tuning? A downpipe is a foundational mod that supports more aggressive ECU maps, upgraded turbos, or full exhaust systems.
Catted vs. Catless Downpipes
When choosing a BMW M5 G90 downpipe, you’ll encounter two main types:
Catted downpipes include a high-flow catalytic converter, offering a balance between performance and emissions compliance.
Catless downpipes remove the catalytic converter entirely, providing maximum performance and sound at the expense of emissions legality in some regions.
Recommended BMW M5 G90 Downpipe
If you’re looking for a premium option, AXI Performance offers a high-quality BMW M5 G90 downpipe engineered specifically for the S68 engine. Made from stainless steel and designed for maximum flow, it’s ideal for both track and street applications.
Installation & Tuning Considerations
While the downpipe upgrade itself is relatively straightforward, we recommend professional installation for optimal results. Additionally, pairing your new BMW M5 G90 downpipe with a proper ECU tune is crucial to prevent check engine lights and fully realize the performance gains.
