Dinan Free Flow Stainless Exhaust for BMW F30 F31 328i F32 F33 428i



SKU: D660-0046

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Dinan engineers designed the BMW 328i/428i 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. Like all Dinan exhausts, their 328i/428i Free Flow Exhaust is engineered to reduce low-RPM drone so the cabin of the vehicle is still intimate and not drowned in an excessively loud tone. 

The system is built with ease in mind and utilizes a simple bolt-on installation with included mounting hardware. It is made from 100% 16 gauge 304 stainless steel and will resist corrosion for years to come. The design features twin 70 mm ceramic black or polished and laser engraved exhaust tips for a tasteful, high-performance look that yields a maximum performance gain of 4 horsepower and 3 ft-lbs of torque.

Benefits of the Dinan F30/31 328i, F32/33 428i Free Flow Exhaust:

  • Easy bolt-on installation with included mounting hardware
  • Enjoyably louder, sportier sound
  • 100% 304 stainless steel construction
  • Twin 70 mm (2.75") laser engraved ceramic black or polished stainless steel exhaust tips
  • 4 HP @ 6600 RPM, 3 FT-LB @ 6600 RPM

*Factory computer-controlled exhaust valve is eliminated.


  • 2012-2016 BMW 328i & xDrive F30 Sedan 
  • 2014-2016 BMW 328i xDrive F31 Wagon 
  • 2014-2016 BMW 428i & xDrive F32 Coupe  
  • 2014-2016 BMW 428i & xDrive F33 Convertible
  • 2012-2016 BMW 328i Sedan
  • 2013-2016 BMW 328i xDrive Sedan
  • 2014-2016 BMW 328i xDrive Wagon
  • 2014-2016 BMW 428i Convertible
  • 2014-2016 BMW 428i Coupe
  • 2014-2016 BMW 428i xDrive Convertible
  • 2014-2016 BMW 428i xDrive Coupe 
Product Specifications:
Labor Hours/Installation Hours 1.30
Max HP Gain 4 @ 6600 RPM
Max Torque Gain 3 @ 6600 RPM