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 ships without tips so that it may attach to the stock tips giving a stock look. The single channel dual exhaust is a full 10 lbs lighter than the stock BMW part. The Dinan Free Flow Exhaust is a sporty sounding exhaust at wide open throttle when you want it but also quite and civilized when you are at light throttle cruise. This is consistent with Dinanô?s core philosophy of "Performance Without Sacrifice". One of the reasons you purchased your BMW is because of its level of refinement. You wonô?t ruin the refined characteristics of your BMW when you use Dinan performance products. This level of development takes time and is the reason Dinan is usually not the first company on the market but you will find it is worth the wait.
2009-15 F01 750i Sedan, 2009-15 F02 750iL Sedan