BMW M5 G90 G99 G9x S68 Catless Exhaust Down Pipe

Unleash the full fury of your BMW M5 G90, G99, or other G9X-series with the S68 twin-turbo V8 by upgrading to a Catless Exhaust Downpipe. Designed for maximum performance, sound, and turbo efficiency, this is the go-to mod for enthusiasts who want their M car to breathe and scream like it should.

⚙️ Product Overview:

• Fitment:

  • BMW M5 G90 / G99 Touring / G9X-Series

  • Engine: S68 4.4L Twin-Turbo V8 (2024+)

• Type:

  • Catless Downpipe – no catalytic converter

  • Designed for track/off-road use only (not street-legal in many regions)

• Material:

  • T304 Stainless Steel or Titanium (optional upgrade)

  • TIG welded with precision CNC flanges

  • Heat-resistant and corrosion-proof finish

• Key Benefits:

  • Massive power gains – Up to 30-50hp and 60-80Nm with tune

  • Quicker turbo spool and reduced backpressure

  • Raw, aggressive exhaust note – burbles, pops, and full turbo sound

  • Weight reduction compared to OEM downpipes with cats

  • Improved thermal efficiency and durability under high load

• Installation:

  • Bolt-on fitment with OEM-style flanges

  • Compatible with factory or aftermarket cat-back systems

  • Requires ECU tune to avoid CEL (Check Engine Light)

🔧 Optional Add-Ons:

• O2 Sensor Spacers / CEL Deletes

• Heat wrap / ceramic coating for thermal management

• ECU tuning for optimal power and CEL delete

• Valved exhaust system pairing for full performance control

📦 What’s Included:

• 1x Set of Catless Downpipes (left + right)

• Mounting hardware & gaskets

• Optional: O2 sensor extensions or defoulers

🚀 Recommended Pairings:

• High-flow intake system

• Valved rear muffler system

• ECU Stage 1/2 tune (BM3, MHD, etc.)

• Charge pipes / Intercooler upgrades

Note:

video is paired with original exhaust