Active Autowerke BMW S58 F97/F98 X3M/X4M Downpipes w GESI CAT - S58 Catted Downpipes

Unlock the full performance potential of your S58-powered SUV with the Active Autowerke Signature Catted Downpipes, engineered specifically for the BMW X3M and X4M. Designed to reduce factory exhaust restrictions, this upgrade delivers faster turbo spool, increased power, and improved throttle response—while maintaining daily drivability.

Featuring dual 4.5” GESI G-Sport Ultra High Output catalytic converters, these downpipes provide maximum exhaust flow with minimal risk of check engine lights, making them one of the most refined high-performance catted solutions available for the S58 platform.

Key Features

• Direct fit for BMW F97 X3M and F98 X4M (S58 engine)
  
• Dual 4.5” GESI G-Sport high-flow catalytic converters
  
• No CEL for catalytic efficiency
  
• 3” stainless steel primary piping with OEM-compatible taper
  
• Integrated flex joints for reduced vibration
  
• Improved turbo spool and throttle response
  
• Increased horsepower and torque output
  
• Cast stainless steel V-band for precise fitment
  
• 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 S58 performance without compromise.

• Faster turbo spool and reduced lag
  
• Improved exhaust flow for increased power
  
• Stronger mid-range and top-end performance
  
• Enhanced throttle response and drivability
  
• Ideal for Stage 1 and Stage 2 tuned setups

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 to handle high-performance and daily driving conditions.

• Full 304 stainless steel construction (1.5mm wall thickness)
  
• Furnace-brazed catalytic core for long-term durability
  
• Precision engineering for OEM-level fitment
  
• Designed for high heat and boosted applications

Installation

• Direct bolt-on replacement for factory downpipes
• No cutting or welding required

Professional installation recommended

Installation available at Sequential Racing – Altona North, Melbourne

Vehicle Fitment

• BMW X3M (F97)
  
• BMW X4M (F98)

Engine: S58 Twin Turbo

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 solutions that deliver real-world gains without compromising reliability.

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

Upgrade your BMW X3M or X4M with the Active Autowerke S58 GESI Catted Downpipes and experience faster spool, increased power, and refined performance.