Dinan engineers designed the F30 340i and F32 440i exhaust to improve exhaust flow by reducing back pressure, resulting in increased power output and a great sporty sound that is civilized when you want it to be, and pleasantly aggressive under hard acceleration. Not only is the tone improved but the additional burbles and pops that come with it are simply intoxicating. Dinan also incorporates a Helmholtz chamber design that reduces resonance or"drone" at low RPM.
The system is built to exacting specifications to ensure the perfect fit using the factory hangers. It is made from 100% 16 gauge 304 stainless steel and will resist corrosion for years to come. The design features twin 89mm (3.5") polished or cermic black exhaust tips for a tasteful high-performance look.
The factory computer-controlled exhaust valve is eliminated.
Features
Twin 89mm (3.5") laser engraved, polished or ceramic black exhaust tips
Uses the factory brackets and hangers for a factory-like fitment
More Power: + 6 HP @ 6600 RPM, + 5 LB-FT @ 6600 RPM
100% 304 stainless steel construction
Helmholtz chamber to reduce drone
Enjoyably louder, sportier sound
Vehicle Fitment
2016-2018 BMW 340i
2016-2018 BMW 340i xDrive
2017-2020 BMW 440i
2017-2020 BMW 440i xDrive
Please verify exact fitment (engine, submodel, and trim) before purchasing.
Manufacturer Part Number: D660-0055-BLK
Images are for illustration purposes only; actual product may vary.
⚠ WARNING: This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
