Dinan's Free Flow 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. An 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 tips for a tasteful high performance look.
Benefits of the Dinan Free Flow Exhaust for the F10 550i:
+ Sportier sound
+ 100% 304 stainless steel construction
+ Bolt-on installation
+ Four 3.5” stainless steel polished & laser engraved exhaust tips
+ Add 10 Horsepower when used in conjunction with the Dinan Performance Software Upgrade
Performance Engine Software (D900-44T5, D903-44T52, D903-44T53, D903-44T54, D903-44T55): The Dinan Performance Engine Software safely increases turbo-boost pressure, along with properly retuned fuel mixtures, ignition timing and full map rescaling. In fact, over 2000 lines of code have been addressed, producing substantial increases in power output while maintaining the civility and reliability expected of a Dinan performance product. There are 5 different stages of software that can be utilized for additional power gains when used in conjunction with additional Dinan performance products.
High Flow Carbon Fiber Cold Air Intake / Strut Tower Brace (D760-0032): Dinan high flow carbon fiber cold air intakes, like most Dinan products, have a sleek and functional appearance that embodies high performance. The F10 550i cold air intake allows cool outside air to be pushed into the engine via a pair of supplemental carbon fiber intake ducts located at the front of the engine bay while also providing structural stiffness to the strut towers. Dinan engineers have painstakingly developed custom tooling to ensure the entire Dinan cold air intake system is sealed like a factory replacement, thereby preventing hot air from the engine compartment to compromise its effectiveness. Improved induction airflow offered by Dinan cold air intake systems increase engine performance, even more so if used in combination with other performance enhancing Dinan products.