Dinan Free Flow Axle-Back Exhaust for BMW | F06 | F1X | M6 | D660-0049

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Part# D660-0049

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Dinan’s Free Flow exhaust system features 100% stainless steel construction measured to exact specifications to ensure proper fit via factory hangers and mounting points. Dyno tuned for maximum exhaust flow with minimum back pressure, this system is designed to provide a more aggressive sound under acceleration, while reducing drone inside the vehicle, thanks to Dinan’s exclusive Helmholtz Chamber and Butterfly Valve technologies. The exhaust gasses exit through larger laser engraved ultra durable polished quad tips.


  • Max gain of +8 HP
  • Uses the factory brackets and hangers for a factory-like fitment
  • Weight Savings
  • Dinan's Tuned Resonance Chamber Technology
  • 100% 304 stainless steel construction
  • Quad 3.5" laser engraved polished stainless steel or black ceramic exhaust tips
  • Butterfly valve increases flow at WOT while also eliminating drone

Installation Instructions: Dinan F06/F1X M6 Axle-Back Exhaust D660-0049 Instructions


  • F06 / F12 / F13 BMW M6 / Gran Coupe - S63 4.4L

⚠️CALIFORNIA WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

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