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Dinan High Flow Mid-Pipe, 2016-2020 BMW 340i/440i D660-0057

Dinan High Flow Mid-Pipe, 2016-2020 BMW 340i/440i D660-0057
Dinan High Flow Mid-Pipe, 2016-2020 BMW 340i/440i D660-0057
$973.99 ea
NEWARRIVING SOONEstimated Ship Date 05/07/2026 (If Ordered Today)15 Available from HOLLEY PERFORMANCE PRODUCTS as of 04/23/2026
Model: 3999587
Select a Vehicle or refer to the Vehicle Fitment Tab below to verify that this part fits your vehicle.
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The 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.
Only confirmed to fit with the Dinan Free Flow Axle Back and stock exhaust systems. Fitment with other axle back units is not guaranteed.
Installation Notes:
Only confirmed to fit with the Dinan Free Flow Axle Back and stock exhaust systems. Fitment with other axle back units is not guaranteed.
About Dinan

Founded in 1979, Dinan is well established as North America’s premiere BMW tuner. In recent years Dinan has further expanded its portfolio to include other European marques such as MINI and Mercedes Benz. For all makes, Dinan develops, manufactures and markets a comprehensive line of high performance products and systems, distributed through a worldwide network of Authorized Dinan Performance Centers that include New Car Dealerships as well as Independent Service/High Performance facilities. The expansive dealer network coupled with Dinan’s industry leading warranty program, quality products and solid engineering have helped make Dinan a household word among driving enthusiasts that desire "performance without sacrifice."

Downloads:

Download Name File Size
d660-0057.pdf919.14KB

Videos:

Vehicle Fitment:

The Vehicle Fitment Guide is to be used as a general reference. The data has been provided by our suppliers and manufacturers and may contain errors or incorrect data. Always refer to a professional to verify correct fitment for your vehicle.
Make Model Submodel Years Engine
BMW 340i xDrive Base 2016 3.0L / L6
BMW 340i xDrive Base 2017 3.0L / L6
BMW 340i xDrive Base 2018 3.0L / L6
BMW 340i Base 2016 3.0L / L6
BMW 340i Base 2017 3.0L / L6
BMW 340i Base 2018 3.0L / L6
BMW 440i xDrive Base 2017 3.0L / L6
BMW 440i xDrive Base 2018 3.0L / L6
BMW 440i xDrive Base 2019 3.0L / L6
BMW 440i xDrive Base 2020 3.0L / L6
BMW 440i Base 2017 3.0L / L6
BMW 440i Base 2018 3.0L / L6
BMW 440i Base 2019 3.0L / L6
BMW 440i Base 2020 3.0L / L6

Specifications:

Dinan Point Value 5.0
Emission Code 2.5
Factory Rated HP Mid-Pipe
Factory Rated Torque (lb-ft) California Proposition 65
Height 10
Labor Time (Hours) 2.5
Length 64
Material 304 Stainless Steel
Part Type Exhaust Pipe
Peak HP 1
Peak HP Gain 10
Peak Torque (lb-ft) 64
Sound Level Pipe Only
System Type Mid-Pipe
Tubing Diameter (in) 3.25
Warning 31
Warranty 19
Weight 31
Width 19

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Dinan High Flow Mid-Pipe, 2016-2020 BMW 340i/440i D660-0057: