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Dinan D660-0077 Free Flow Axle-Back Exhaust System with Polished Tips

(2005 Porsche 911; 2017-2020 BMW 440i; 2017-2020 BMW 440i xDrive; 2017-2020 BMW 440i Gran Coupe; 2017-2020 BMW 440i xDrive Gran Coupe)

Part of: Dinan Free Flow Axle-Back Exhaust System

Other options in this family: Dinan D660-4602 Dinan D660-0050-BLK Dinan D660-0046-BLK Dinan D660-0086-BLK Dinan D660-3950

Manufacturer

Picture for manufacturer Dinan

Part Number

D660-0077
5 reviews
Sale Price

$1,649.95

Estimated ship date Tuesday, November 24

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Fitment guaranteed

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Product Details

The Dinan D660-0077 Free Flow Axle-Back Exhaust is a precision-engineered performance exhaust system designed specifically for the BMW F33 (Convertible) and F36 (Gran Coupe) 440i platforms. Engineered to reduce exhaust back pressure, this system delivers measurable power gains alongside a dramatically improved exhaust note—refined during everyday driving and pleasantly aggressive under hard acceleration.

Performance Gains:

  • +6 HP at 6,600 RPM
  • +5 lb-ft of torque at 6,600 RPM

Key Features:

  • Improved exhaust flow via reduced back pressure for increased power output
  • Helmholtz chamber design eliminates unwanted resonance and drone at low RPM
  • Built from 100% 16-gauge 304 stainless steel for long-lasting corrosion resistance
  • Twin 89mm (3.5") laser-engraved exhaust tips — available in polished or ceramic black finish
  • Uses factory brackets and hangers for a precise, OEM-quality fit
  • Eliminates the factory computer-controlled exhaust valve
  • Legal for use on emissions-controlled vehicles — does not affect vehicle emissions

The Dinan D660-0077 axle-back exhaust installs using the existing factory mounting points, making it an ideal direct-fit upgrade. The polished tips (D660-0077) and ceramic black tips (D660-0077-BLK) are laser-engraved with the Dinan logo for a clean, high-performance aesthetic that complements the 440i's sport-oriented styling.

Products specifications

Fits

2005 Porsche 911; 2017-2020 BMW 440i; 2017-2020 BMW 440i xDrive; 2017-2020 BMW 440i Gran Coupe; 2017-2020 BMW 440i xDrive Gran Coupe

Brand

Dinan

Tip Diameter

3.500 in.

Prop 65

WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

Exhaust Type

Axle-Back

Material

304S Stainless Steel

Category

Exhaust

Dinan Point Value

3

Emission Code

5

Height

11

Labor Time (Hours)

1.2

Length

48

Max HP Gain

6 @ 6600 RPM

Max Torque (lb-ft) Gain

5 @ 6600 RPM

Product Type

Axle-Back Exhaust

Tip Finish

Polished

Warning

California Proposition 65

Weight

45

Width

30

I will see if Im Recieving what I planned on ordering

It was easy to find the needed part once I entered in my vehicle!!!

cheap and easy. will be back again

great price

Thanks. Great Service, great prices.

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