Description
Upgrade the sound, character, and driving experience of your BMW 4 Series M440i B58 with the DCE Parts Valvetronic Catback Exhaust. Designed specifically for the B58-powered M440i, this performance exhaust system combines high-grade stainless steel construction, adjustable exhaust valve technology, and refined everyday drivability.
The system is engineered to provide an enhanced exhaust experience without sacrificing the comfort expected from a premium BMW. With the valves closed, the exhaust maintains a refined and controlled sound profile, making it suitable for daily driving and extended highway journeys. Cabin noise remains well controlled during normal cruising.
When the valves are opened, the system delivers a deeper, louder, and more aggressive exhaust note, allowing the B58 engine to produce a more engaging and performance-oriented sound under acceleration. This adjustable design provides the flexibility to switch between a quieter exhaust character and a sportier sound depending on driving conditions.
Electronic & Vacuum Valve Options
The DCE Parts Valvetronic Exhaust can be configured with electronic or vacuum-controlled valve actuators, depending on the selected system. The exhaust valves are operated through a dedicated controller unit, providing convenient control over the exhaust sound.
The valve-control system is designed to remain independent of the vehicle's brake system. This helps avoid unwanted changes in brake pedal feel that can occur when exhaust valve operation shares the vehicle's brake vacuum system.
The high-quality exhaust valves are designed for durability and reliable operation, providing an excellent balance between sound control, comfort, and performance.
Premium Construction
The exhaust system is manufactured from high-grade stainless steel for durability, corrosion resistance, and long-term reliability. For enthusiasts seeking a lightweight and premium-material upgrade, titanium construction is available as an optional upgrade.
The system can also be fitted with optional exhaust tips, allowing you to further customize the appearance of your M440i.
Key Features
- Designed specifically for BMW G22/G23/G26 M440i B58
- High-grade stainless steel construction
- Optional titanium construction available
- High-grade electronically controlled exhaust valves
- Optional vacuum valve configuration where applicable
- Dedicated valve controller
- Includes remote controls
- Includes 12V power supply
- Adjustable exhaust sound
- Refined sound with valves closed
- Deeper and sportier exhaust note with valves open
- Durable and reliable valve system
- Optional exhaust tips available
- Catback exhaust configuration
Fitment
Designed for the following BMW 4 Series M Performance applications:
- BMW G22 M440i B58
- BMW G23 M440i B58
- BMW G26 M440i B58
G22: BMW 4 Series Coupe
G23: BMW 4 Series Convertible
G26: BMW 4 Series Gran Coupe
DCE Parts also offers a BMW B58 Downpipe for the G22, G23, and G26 M440i B58.
OPF/GPF Information
For vehicles equipped with an OPF/GPF emissions system, an ECU remap may be required when making certain exhaust modifications. OPF delete applications are intended for off-road use only. Always verify applicable emissions and noise regulations before installation or use.
Important Legal & Emissions Notice
Certain exhaust components and performance products may alter, bypass, or remove emissions-control systems. These products may be intended for off-road, race, motorsport, or competition use only and may not be legal for use on public roads in your country or region.
It is the buyer's responsibility to verify compliance with all applicable local, state, and federal laws and regulations before purchasing, installing, or operating the product.
For vehicles operated in the United States, installation or use of emissions-related modifications on pollution-controlled vehicles may violate the U.S. Clean Air Act and could result in significant fines or penalties. Use these products only where permitted by applicable law.
