Dinan's Free Flow Axle-Back Exhaust improves 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 harder acceleration with zero drone. 100% stainless steel construction and exacting specifications ensure that the system fits correctly using the factory hangers and will resist corrosion for years to come. A vacuum controlled butterfly valve is utilized to improve flow at wide-open throttle while keeping things civilized and "drone" free throughout. The design reduces overall weight as well and features 3.5'' polished, or ceramic black, tips for a tasteful high-performance look.
Features
Quad 3.5" laser engraved, polished or ceramic black exhaust tips
Uses the factory brackets and hangers for a factory-like fitment
Drone abatement technologies used to reduce cabin resonance
More Power: + 10 HP when coupled with engine software
100% 304 stainless steel construction
Enjoyably louder, sportier sound
Vehicle Fitment
2011-2016 BMW 550i
2011-2016 BMW 550i xDrive
Please verify exact fitment (engine, submodel, and trim) before purchasing.
Manufacturer Part Number: D660-0036-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.
