BMW G90 M5 Cat Less Downpipes

Unlock the full performance potential of your 2025+ BMW G90 M5 with our Cat-Less Downpipes, engineered to significantly increase exhaust flow, turbo response, and overall engine performance. Designed for high-output builds and track-focused setups, these downpipes eliminate the restrictive factory catalytic converters, unleashing the true power of the S68 twin-turbo V8.

⚙️ Key Features:

• Cat-Less Design for Unrestricted Flow:
  Removes the dense factory catalytic converters, reducing backpressure and allowing the turbos to spool faster and more efficiently. This results in dramatic improvements in power and throttle response.

• Mandrel-Bent Stainless Steel Construction:
  Crafted from high-grade T304 stainless steel with smooth mandrel bends to ensure optimal flow and long-term durability under high-temperature conditions.

• Precision TIG Welding:
  Expertly welded for maximum strength, perfect fitment, and a clean, high-performance finish.

• OEM-Style Flanges and Mounting Points:
  Designed for seamless bolt-on installation to the stock or aftermarket turbochargers and exhaust system. All brackets and O2 sensor bungs are positioned to retain full sensor compatibility.

• Aggressive Sound Profile:
  Expect a louder, sharper, and more exotic exhaust note with increased turbo whistle and dramatic overrun pops and crackles—especially when paired with a valved exhaust.

📈 Performance Gains (with tune):

• +40–60whp

• +60–80wtq

• Faster turbo spool and increased mid-to-top end power

• Lower EGTs (exhaust gas temperatures)

Note: A performance ECU tune is highly recommended when installing cat-less downpipes to prevent check engine lights (CEL) and to fully optimize AFR and boost targets.

📦 What’s Included:

• 2x Cat-Less Downpipes (Driver & Passenger Side)

• Integrated O2 Sensor Bungs (Pre & Post)

• Mounting Hardware & Gaskets (where applicable)

✅ Compatibility:

• Vehicle: 2025+ BMW G90 M5

• Engine: S68 Twin-Turbo V8

• Compatible with both stock and aftermarket mid-pipes and exhaust systems

🛠 Installation Notes:

Professional installation is strongly recommended due to the tight packaging of the S68 turbo system. The downpipes are designed for a precise fit and reuse OEM mounting points and brackets.

⚠️ Disclaimer:

For off-road or racing use only. Cat-less downpipes remove emissions equipment and are not legal for street use in many regions. Please check your local laws and regulations before purchase and installation.

Free the Flow. Feel the Surge.
Experience raw, unfiltered performance with the BMW G90 M5 Cat-Less Downpipes—an essential upgrade for enthusiasts chasing maximum power and response from their ultimate M machine.