GFBV D660-0057 Dinan High Flow Mid-Pipe - 2016-2020 BMW 340i/440i - Fits select 2016-2020 BMW models

Stainless Steel - 3.25" - F30/F32The Dinan High Flow Mid-pipe for the F30 340i and F32 440i allows for an aggressive tone to be achieved out of the stock system. Coupled with the associated Dinan exhaust the sound is further perfected into an aggressive growl that is hard to ignore. This full mid-section removes the factory center section, including both resonators, and replaces it with straight through 3.25" T304 stainless steel tubing for better flow, and sound while also reducing the weight by 3 pounds.Features and Benefits: 100% 304 stainless steel construction.; Bolt-on installation.; Deletes both resonators between the catalyst and the rear muffler.; Includes mounting hardware.; Stock hydro-formed 80mm piping is replaced by 3.25" (82.6mm) mandrel-bent piping for free flow.; Weight savings over stock: Stock = 24 lbs; Dinan = 21 lbs.Only confirmed to fit with the Dinan Free Flow Axle Back and stock exhaust systems. Fitment with other axle back units is not guaranteed.DIN EP