Unlock the true performance of your BMW B58-powered vehicle with the RENNVOX BMW B58 200 Cell Sports Catted Downpipe. Designed to maximise exhaust flow, improve turbocharger efficiency and enhance exhaust sound, this premium performance upgrade delivers increased responsiveness, greater performance potential and an unmistakable straight-six soundtrack.

The factory downpipe is one of the most restrictive components in the BMW B58 turbocharged exhaust system. By replacing it with the RENNVOX high-flow downpipe, exhaust gases exit the turbocharger with significantly less restriction, reducing back pressure and allowing the turbocharger to spool faster. The result is sharper throttle response, stronger mid-range performance and a more engaging driving experience.

Every RENNVOX downpipe features a premium 200 Cell Sports Catalytic Converter. Compared to the restrictive factory catalytic converter, the high-flow sports catalyst dramatically improves exhaust gas flow while providing a refined alternative to catless downpipes. The result is increased performance, a deeper exhaust note and the distinctive turbocharged inline-six sound the B58 engine is renowned for.

Manufactured from premium T304 stainless steel using precision TIG welding and mandrel-bent tubing, the RENNVOX BMW B58 Downpipe is engineered for exceptional durability, corrosion resistance and long-term reliability. Every component is designed to withstand the extreme temperatures generated by modern turbocharged engines while maintaining optimum exhaust flow.

Designed as a direct replacement for the factory downpipe, the RENNVOX system installs using the original mounting locations and is compatible with both the factory exhaust system and most aftermarket cat-back exhausts. Whether your vehicle is standard or professionally tuned, it provides the perfect foundation for increased performance.

Suitable for a wide range of BMW vehicles equipped with the B58 3.0-litre turbocharged inline-six engine, the RENNVOX downpipe combines OEM-quality fitment with the performance, sound and reliability expected from a premium European performance exhaust component.

Vehicle Compatibility

This downpipe is suitable for compatible BMW vehicles fitted with the B58 3.0-litre turbocharged inline-six petrol engine.

• BMW M140i
• BMW M240i
• BMW 340i
• BMW 440i
• BMW 540i
• BMW 640i GT
• BMW 740i
• BMW 840i
• BMW X3 M40i
• BMW X4 M40i
• BMW X5 xDrive40i
• BMW X6 xDrive40i
• BMW X7 xDrive40i
• BMW Z4 M40i
• Toyota GR Supra 3.0 (B58)

Important: BMW B58 vehicles were produced with different downpipe configurations depending on production date, emissions equipment (including OPF/GPF), turbocharger revision and market. Please confirm your existing downpipe configuration before ordering.

Package Includes

• RENNVOX BMW B58 Performance Downpipe
• Integrated High-Flow 200 Cell Sports Catalytic Converter
• Required installation hardware (where applicable)

Frequently Asked Questions

Which vehicles does this downpipe fit?

This downpipe is designed for compatible BMW vehicles equipped with the B58 3.0-litre turbocharged inline-six petrol engine. Please confirm your vehicle's production date, OPF/GPF configuration and turbocharger flange before ordering.

What are the benefits of upgrading the factory downpipe?

The factory downpipe is one of the most restrictive components in the exhaust system. Replacing it with the RENNVOX high-flow downpipe improves exhaust flow, reduces back pressure, increases turbocharger efficiency and delivers improved throttle response and performance.

Does this downpipe include a catalytic converter?

Yes. It incorporates a premium High-Flow 200 Cell Sports Catalytic Converter that provides significantly improved exhaust flow compared with the factory catalyst while offering a refined alternative to a catless downpipe.

Will this fit my factory exhaust?

Yes. The RENNVOX downpipe is designed as a direct replacement for the factory downpipe and is compatible with the original exhaust system as well as most aftermarket cat-back exhaust systems.

Is ECU tuning required?

No. The downpipe can be installed on a standard vehicle. However, ECU tuning is recommended to maximise performance and may be required to prevent catalyst efficiency fault codes depending on the vehicle configuration.

How will the exhaust sound change?

The RENNVOX downpipe enhances the natural character of the BMW B58 engine by producing a deeper, more aggressive exhaust note with increased turbo spool sound and improved exhaust tone throughout the rev range.

Is professional installation recommended?

Yes. Professional installation is recommended to ensure correct fitment and reliable long-term performance.

Is this downpipe legal for road use?

Road legality varies between Australian states and territories. It is the responsibility of the vehicle owner to ensure compliance with all applicable emissions and vehicle regulations.