MODE Design Catless Downpipe B48 - F40/44

Improve exhaust flow, turbo response, and sound with the MODE Design B48 Catless Downpipe. Designed as a direct replacement for the restrictive factory catalytic downpipe, the catless design reduces exhaust backpressure and allows the B48 turbocharger to operate more efficiently. When paired with an appropriate ECU calibration, it can support improved throttle response, stronger power delivery, and increased performance potential. Manufactured from high-quality stainless steel, the downpipe features precision-machined flanges and durable welded construction for reliable fitment and long-term performance. It also delivers a deeper, more aggressive exhaust note without requiring permanent modifications to the vehicle. Features High-flow catless design Reduces exhaust restriction and backpressure Improves turbocharger response and efficiency Supports increased power and torque Deeper and more aggressive exhaust note High-quality stainless-steel construction Precision-machined flanges Direct replacement for the factory downpipe ECU calibration recommended Vehicle Fitment This item fits the following B48-powered BMW models: BMW 1 Series M135i xDrive B48 • 2019+ F40 BMW 2 Series M235i xDrive B48 • 2019+ F44 Please confirm your vehicle model, production date, engine, and downpipe configuration before ordering. Important: This product is intended for off-road, motorsport, and competition use only. Removal of the factory catalytic converter may not comply with road-registration or emissions regulations. A suitable ECU calibration is recommended, and installation may trigger a check engine light without supporting software.