Active Autowerke S63TU GESI Catted Downpipes – BMW M5 / M8 / X5M / X6M

High-Performance Exhaust Upgrade with GESI G-Sport Catalysts

Unlock the full potential of your S63TU-powered BMW with the Active Autowerke GESI Catted Downpipes, engineered for the F90 M5, F92/F93 M8, F95 X5M, and F96 X6M. Designed to eliminate restrictive factory downpipes, this upgrade delivers increased horsepower, faster turbo spool, and improved throttle response - while maintaining refined drivability.

Featuring dual 4.5” GESI G-Sport Ultra High Output catalytic converters, this system provides maximum exhaust flow with minimal risk of check engine lights, making it the ideal balance between performance and emissions efficiency (non-CARB regions).

Key Features

• Direct fit for BMW S63TU platforms (M5, M8, X5M, X6M)
  
• Dual 4.5” GESI G-Sport high-flow catalytic converters
  
• No CEL for catalytic efficiency
  
• Significant increase in horsepower and torque
  
• Reduced turbo lag and improved throttle response
  
• 3.5” factory-matched V-band inlet for precise fitment
  
• High-flow mandrel-bent piping for maximum efficiency
  
• Includes extended lower section (mid-pipe style design)
  
• Compatible with OEM O2 sensor heat shield
  
• Bolt-on installation – no cutting or welding required
  
• TIG-welded 304 stainless steel construction
  
• Rated for 500–850 horsepower applications
  
• Withstands temperatures up to 1500°F

Performance Benefits

Engineered to maximise twin-turbo V8 performance.

• Faster turbo spool and improved boost response
  
• Increased exhaust flow for higher power output
  
• Stronger acceleration across the entire RPM range
  
• Enhanced throttle response and drivability
  
• Aggressive yet refined exhaust tone

GESI Catalytic Technology

Advanced emissions control with high-flow performance.

• 400 cell ultra high-flow catalytic converters
  
• EPA registered and OBD2 compliant (non-CARB regions)
  
• Designed to minimise or eliminate CEL
  
• Proprietary precious metal loading for reduced emissions
  
• Full 304 stainless steel substrate for durability

Build Quality

Built for durability and high-performance applications.

• Full 304 stainless steel construction
  
• Precision TIG welding for strength and reliability
  
• Mandrel-bent piping for smooth airflow
  
• Furnace-brazed catalytic core for long-term durability
  
• Manufactured in Miami, Florida

Installation

• Direct bolt-on replacement
• No cutting or welding required

Professional installation highly recommended

Installation available at Sequential Racing – Altona North, Melbourne

Vehicle Fitment

• BMW F90 M5
  
• BMW F92 / F93 M8
  
• BMW F95 X5M
  
• BMW F96 X6M

Engine: S63TU Twin Turbo V8

Important Notes

• Not legal for use in California (CARB restrictions)
  
• Designed for performance use depending on local regulations
  
• Warranty may be void with excessive burble settings

Warranty

• 5 Year / 50,000 Mile warranty (shell and tube ends)
  
• 2 Year / 25,000 Mile warranty on catalytic core

Why Choose Sequential Racing?

Sequential Racing supplies premium performance upgrades for BMW M and GR platforms, focusing on proven products that deliver real-world gains without compromising reliability.

• High-flow performance with minimal compromise
  
• Trusted Active Autowerke engineering
  
• OEM-level fitment with maximum performance

Upgrade your BMW S63TU platform with Active Autowerke GESI Catted Downpipes and experience faster spool, increased power, and refined high-performance driving.