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 

We want you to have our parts as quickly as possible. Products that are in stock will be shipped and delivered domestically in 1–5 business days. It will take seven to twenty-one business days for international shipment. An email confirming that your order is being completed will be sent to you once you place it. For in-house orders, please allow a day for processing and the updating of the tracking number. The product page accurately shows the quantity.

Custom steering wheels typically take 20-25 business days for production, with an additional 5-7 business days for shipping. Production and delivery times may vary depending on the complexity of the order and the shipping destination. For more details, please refer to our Shipping Policy.

Our Return Policy permits returns only for products that are found to be defective. You have 30 days from the date of delivery to inspect the product and report any issues.

Regular Cleaning: Maintain carbon fiber parts by cleaning them regularly with a soft cloth and a mixture of mild soap and water. Avoid abrasive or harsh cleaners that could harm the finish.

Use Microfiber Pads and Cloths: Opt for microfiber pads and cloths when cleaning or applying protective coatings to prevent surface scratches.

Protect from Sun and Chemicals: Limit exposure to direct sunlight and harsh chemicals, as they can damage carbon fiber. When possible, use protective covers or park your vehicle in shaded areas.