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Exhaust› Exhaust Pipes, Systems and Components

Dinan

High Flow Middle Exhaust

$1,687.95 $1,549.99 Save $137.96

SKU: D660-0080-DINAN

Out of Stock
Special Order
Ships in 4–6 weeks
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$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The Dinan D660-0080 is a high-flow middle exhaust connecting pipe engineered for the 2018-2023 BMW M550i xDrive (G30). It features 3-inch stainless steel tubing with mandrel-style routing to ensure consistent exhaust flow and reduce restriction.
Show original supplier description
The Dinan High Flow Middle Exhaust is engineered to provide a more aggressive and voluminous sound for the 2018-2023 BMW M550i xDrive. This mid-pipe replaces the factory's hydro-formed center section and resonator with larger, 3-inch diameter T304 stainless steel tubing, promoting freer-flowing exhaust gases. At the heart of this system is a meticulously crafted X-pipe crossover, constructed from mandrel-bent tubing. This design minimizes restriction and helps to create a smoother, fuller, and more aggressive exhaust note by promoting even flow to both banks of the exhaust tips and eliminating unwanted sound nuances. The use of 100% 304 stainless steel construction ensures durability and corrosion resistance. The manufacturer states that this part is legal for sale or use on all emissions-controlled, uncontrolled, and racing vehicles as it does not affect vehicle emissions. However, it is confirmed to fit only with the Dinan Free Flow Axle Back and stock exhaust systems; fitment with other axle-back units is not guaranteed.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandDinan
Part NumberD660-0080-DINAN
CategoryExhaust
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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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