BMW F90 M5 Catted Downpipe With Heat Shield

BMW F90 M5 Catted Downpipes with Heat Shield

Enhance the performance, sound, and drivability of your BMW F90 M5 with these High-Flow Catted Downpipes featuring integrated thermal heat shielding — engineered to improve exhaust flow, turbocharger efficiency, and overall engine performance while maintaining an ideal balance between power and everyday usability.

Designed specifically for the 4.4L Twin-Turbocharged S63 engine, these downpipes utilise high-flow performance catalytic converters to significantly reduce exhaust restrictions compared to the factory units. By improving exhaust gas evacuation and reducing backpressure, the turbochargers can spool faster and operate more efficiently, resulting in sharper throttle response, improved power delivery, and increased performance potential.

Constructed from premium 304 stainless steel and wrapped in high-temperature thermal heat shielding, these downpipes help reduce radiant heat within the engine bay while providing exceptional durability under demanding driving conditions. Precision TIG welding and mandrel-bent tubing ensure optimal exhaust flow and long-term reliability.

Whether you're building a responsive street car or a powerful Stage 2 setup, these catted downpipes offer the ideal balance between performance, sound, and practicality.

Key Features

High-Flow Performance Catalysts

Utilises high-flow catalytic converters to improve exhaust flow while maintaining a cleaner exhaust system compared to catless alternatives.

Integrated Thermal Heat Shielding

Helps reduce engine bay temperatures and protects surrounding components from excessive radiant heat.

Premium 304 Stainless Steel Construction

Manufactured from corrosion-resistant stainless steel for exceptional durability and long-term reliability.

Improved Turbo Efficiency

Reduced exhaust restrictions allow the turbochargers to spool faster and operate more efficiently.

Mandrel-Bent Tubing

Maintains smooth and unrestricted exhaust flow throughout the system.

Precision TIG Welded

Strong, clean welds engineered to withstand extreme temperatures and demanding performance applications.

Direct Bolt-On Fitment

Designed specifically for the BMW F90 M5 using factory mounting locations.

Performance Benefits (When Tuned)

• Increased horsepower and torque potential
• Faster turbo spool and improved throttle response
• Reduced exhaust backpressure
• Improved turbocharger efficiency
• Enhanced engine responsiveness
• Ideal supporting modification for Stage 1 and Stage 2 builds

Performance gains will vary depending on tuning, fuel quality, and supporting modifications.

Sound Characteristics

Compared to the factory downpipes, these high-flow catted downpipes typically deliver:

• Deeper and sportier exhaust tone
• Increased turbo spool acoustics
• Enhanced exhaust volume without excessive harshness
• More aggressive tone under acceleration
• Refined daily driving characteristics
• Improved overall exhaust presence and character

Vehicle Fitment

BMW F90 M5 (2018–2023)

4.4L Twin-Turbocharged S63 Engine

Please Note

Professional installation is strongly recommended.

Performance gains may vary depending on vehicle condition, ECU calibration, fuel quality, and supporting modifications.

Check local emissions regulations before installation.

Why Choose Proven Performance Parts

We specialise in high-performance parts for European vehicles — including Volkswagen GTI & R models, Audi S/RS platforms, and BMW M vehicles. Every product we offer is carefully selected for its quality, fitment, and real-world performance — tested by enthusiasts, for enthusiasts.