MAD Primary Downpipes | BMW F90 M5 | F91/F92/F93 M8 S63

MAD Primary Downpipes

BMW F90 M5 | BMW F91/F92/F93 M8

Unlock improved exhaust flow, faster turbo response, and a more aggressive exhaust note with MAD Primary Downpipes. Designed for S63-powered BMW models, these downpipes replace the restrictive factory primary downpipe sections with a high-flow performance upgrade.

Constructed from premium T304 stainless steel, the downpipes feature smooth mandrel bends and carefully designed transitions to reduce backpressure and improve exhaust-gas flow. Integrated flex sections allow for proper movement while helping maintain reliable fitment under demanding driving conditions.

The direct bolt-on design connects to the factory exhaust system without cutting or welding. Necessary installation hardware and gaskets are included.

Product Features

• Premium T304 stainless-steel construction
• Replaces the factory primary downpipes
• Smooth mandrel bends for maximum airflow
• Integrated flex sections
• Helps reduce exhaust backpressure
• Supports quicker turbo spool
• Improved throttle response
• More aggressive exhaust tone
• Compatible with right-hand-drive and left-hand-drive vehicles
• Direct bolt-on installation
• No cutting or welding required
• Necessary hardware and gaskets included
• Lifetime warranty against defects and fitment issues
• 90-day return period
• Precision-engineered fitment

Performance Benefits

• Potential gains of up to 30 horsepower on stock turbochargers
• Additional power potential with upgraded turbochargers
• Improved exhaust flow
• Faster turbo response
• Increased horsepower and torque potential

Actual performance results depend on tuning, fuel, supporting modifications, and vehicle condition.

Vehicle Fitment

• BMW M5 (F90)
• BMW M8 Convertible (F91)
• BMW M8 Coupe (F92)
• BMW M8 Gran Coupe (F93)

Engine: S63 Twin-Turbo V8

Important Notes

• Primary downpipes may trigger a check-engine light.
• ECU tuning may be required for proper operation.
• These downpipes may not comply with emissions or road-use regulations in your area.
• Intended for off-road or competition use where permitted.
• Confirm exact vehicle compatibility before ordering.

Availability

Pre-Order

Once available, orders generally ship within 1–2 business days.

Installation

Professional installation and proper tuning are strongly recommended. Uproar Customs does not provide installation instructions or technical support for self-installation.