Description
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Unlock the true sound and performance of your B58-powered BMW with our 2024+ BMW M340i/M440i Downpipe, engineered specifically for the latest G20 LCI platform and related chassis. Designed for the 3.0L turbocharged inline-six engine, this downpipe targets one of the most restrictive points in the factory exhaust system to dramatically improve flow and efficiency.
By reducing exhaust backpressure directly at the turbo outlet, this performance downpipe allows your engine to breathe more freely, resulting in sharper throttle response, improved mid-range power delivery, and noticeable gains in horsepower and torque when paired with proper tuning.
Beyond performance, this upgrade also enhances the driving experience by unlocking a deeper, more aggressive exhaust tone from the B58 engine. The result is a more engaging, motorsport-inspired sound profile that transforms everyday driving.
Constructed from high-grade T304 stainless steel with precision mandrel bends and TIG-welded joints, this downpipe is built to handle extreme temperatures and long-term performance demands while maintaining OEM-level fitment.
Features
- Designed for 2024+ BMW M340i and M440i models
- Compatible with G20, G22, G23, G26 chassis
- Supports B58 3.0L turbo inline-six engine
- High-flow performance downpipe design
- Reduces exhaust backpressure
- Improves throttle response and turbo efficiency
- Enhances exhaust sound and engine tone
- TIG-welded construction for durability
- Mandrel-bent tubing for optimal flow
- Direct bolt-on installation
- Fully reversible upgrade
Benefits
- Increased horsepower and torque potential (with tune)
- Faster turbo spool and improved responsiveness
- More aggressive exhaust sound
- Improved mid-range power delivery
- Enhanced driving dynamics and engagement
- Reliable long-term performance under heat
- Clean OEM-style fitment with performance focus
Vehicle Fitment
BMW 3 Series / 4 Series (B58 Models)
- 2024 BMW M340i
- 2025 BMW M340i
- 2026 BMW M340i
- 2024 BMW M440i
- 2025 BMW M440i
- 2026 BMW M440i
Chassis Codes
- G20 Sedan
- G22 Coupe
- G23 Convertible
- G26 Gran Coupe
Specifications
- Engine: B58 3.0L Turbo Inline-6
- Material: T304 Stainless Steel
- Construction: Mandrel Bent Tubing
- 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 designed for enthusiasts who want a significant performance and sound upgrade without compromising reliability or fitment. With optimized exhaust flow, durable stainless steel construction, and OEM-style installation, this is one of the most impactful modifications you can make to the B58 platform.
