Description
Disclaimer : Cancellations within 24 hours are subject to a cancellation fee. After 24 hours, a higher fee will apply.
Unlock the full potential of your B58-powered BMW with our performance downpipe designed for the 2019–2023 M340i and M440i. Engineered for the G20, G22, G23, and G26 chassis, this upgrade focuses on one of the most restrictive points in the factory exhaust system to significantly improve flow and performance.
By opening up the exhaust path directly off the turbocharger, this downpipe reduces backpressure and allows the engine to breathe more efficiently. The result is sharper throttle response, improved mid-range acceleration, and noticeable gains in horsepower and torque when paired with proper tuning.
This performance-focused design also enhances the exhaust note, giving the B58 engine a more aggressive and engaging sound character without sacrificing drivability.
Constructed from high-quality T304 stainless steel with mandrel-bent tubing and precision TIG welding, this downpipe is built for durability under high heat and demanding driving conditions. It is designed as a direct bolt-on replacement for the factory unit, ensuring clean OEM-style fitment across all supported models.
Features
- Designed for 2019–2023 BMW M340i and M440i
- Compatible with B58 3.0L turbo inline-six engine
- Catless high-flow performance design
- Reduces exhaust backpressure
- Improves throttle response and turbo efficiency
- Enhances exhaust sound and engine tone
- T304 stainless steel construction
- Mandrel-bent piping for optimal flow
- Precision TIG welded joints
- Direct bolt-on installation
- Fully reversible upgrade
Benefits
- Increased horsepower and torque potential (with tune)
- Faster turbo spool and sharper response
- More aggressive exhaust sound
- Improved mid-range acceleration
- Enhanced driving engagement
- Long-term heat resistance and durability
- OEM-style fitment and installation
Vehicle Fitment
BMW 3 Series / 4 Series (B58 Models)
- 2019 BMW M340i
- 2020 BMW M340i
- 2021 BMW M340i
- 2022 BMW M340i
- 2023 BMW M340i
- 2019 BMW M440i
- 2020 BMW M440i
- 2021 BMW M440i
- 2022 BMW M440i
- 2023 BMW M440i
Chassis Codes
- G20 Sedan
- G22 Coupe
- G23 Convertible
- G26 Gran Coupe
Specifications
- Engine: B58 3.0L Turbo Inline-Six
- Material: T304 Stainless Steel
- Design: Catless High-Flow Downpipe
- Welding: Precision TIG Welded
- Installation: Direct Bolt-On
- Reversible: Yes
What's Included
- Performance Downpipe Assembly
- Installation Hardware Kit
Why Choose Our B58 Downpipe?
Our BMW M340i/M440i downpipe is built for enthusiasts who want maximum response, sound, and performance from their B58 engine. With improved exhaust flow, durable construction, and OEM-level fitment, it delivers one of the most effective bolt-on upgrades for the platform.
