WARNING: This product can expose you to chemicals that are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information, visit www.P65warnings.ca.gov.The Dinan High Flow Mid-Pipe (D660-0057) is a performance-mandated exhaust upgrade for the 2016-2020 BMW 340i (F30) and 440i (F32), engineered to achieve an aggressive tone out of the stock system and deliver superior flow. This full mid-section kit removes the factory center section, including both resonators, and replaces the stock 80mm piping with straight-through 3.25" (82.6mm) T304 stainless steel tubing. This substitution significantly improves exhaust gas flow and sound while also achieving a 3 pound weight reduction over the stock 24 pound system.
Features:
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Resonator Deletion: Deletes both resonators located between the catalyst and rear muffler for a significant increase in volume and tone.
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Optimized Flow & Diameter: Stock hydro-formed 80mm piping is replaced by 3.25" (82.6mm) mandrel-bent piping for superior, restriction-free flow.
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Structural Quality: Built from 100% 304 stainless steel construction for long-term durability and corrosion resistance.
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Weight Reduction: Achieves a 3 pound weight saving (reducing the stock weight from 24 lbs to 21 lbs).
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Installation: Designed for a simple, direct bolt-on installation with all mounting hardware included.
Product Contains:
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(1) Dinan High Flow Mid-Pipe Assembly
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(1) Complete Installation Hardware Kit
Important Note: Fitment is only confirmed with the Dinan Free Flow Axle Back and stock exhaust systems. Fitment with other aftermarket axle-back units is not guaranteed.
Warranty This product is supported by a Manufacturer's Warranty. Note: Manufacturer warranty terms are subject to change.
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