SKU: 90107912845

Dinan Free Flow Axle-Back Exhaust - 2012-2016 BMW M5 - D660-0044-BLK

Sale price$1057.47 Regular price$1174.97
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Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Sep 26 - Oct 1

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Description

Dinan Free Flow Axle-Back Exhaust - 2012-2016 BMW M5 - D660-0044-BLKOverview: Dinan's Free Flow Axle Back exhaust system features 100% stainless steel construction measured to exact specifications to ensure proper fit via factory hangers and mounting points. Dyno tuned for maximum exhaust flow with minimum backpressure, this system is designed to provide a more aggressive sound under acceleration while reducing drone inside the vehicle, thanks to Dinan's exclusive Helmholtz Chamber and Butterfly Valve technologies.

Overview:

Dinan's Free Flow Axle-Back exhaust system features 100% stainless steel construction measured to exact specifications to ensure proper fit via factory hangers and mounting points. Dyno tuned for maximum exhaust flow with minimum backpressure, this system is designed to provide a more aggressive sound under acceleration while reducing drone inside the vehicle, thanks to Dinan's exclusive Helmholtz Chamber and Butterfly Valve technologies. The exhaust gasses exit through larger laser engraved ultra durable polished, or ceramic black, quad tips. Every Dinan product comes with our industry-exclusive factory matching new car bumper to bumper warranty and is designed and tested in Morgan Hill, California and can be purchased and installed at any Dinan Approved BMW dealership nationwide.

Features:

  • More Power: +8 HP
  • Helmholtz chamber and butterfly valve technology incorporated to remove drone
  • "Straight through" canister design
  • Enjoyably louder, throatier and deep sound
  • Quad 3.5" black ceramic coated, or polished stainless, laser engraved exhaust tips
  • 100% 304 stainless steel construction
  • Uses the factory brackets and hangers for a factory-like fitment

Application:

Year Make Model Submodel Engine Size
2012 - 2015 BMW M5 4.4L V8

Specs:

Brand Dinan
Dinan Point Value 3
Emission Code 5
Height 11
Labor Time (Hours) 1.9
Length 48
Material 304 Stainless Steel
Max HP Gain 8
Product Type Axle-Back Exhaust
Sound Level Aggressive / Moderate
System Type Axle-back
Warning California Proposition 65
Weight 62.7
Width 30
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 90107912845

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S. Rybicki
Cuba, US
★★★★★ 1
Pocket is phony.
Size: Large, Color: Grey
Pocket is phony.
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Reviewed in the United States on March 10, 2026
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Terry L. Brown
Natrona Heights, US
★★★★★ 4
Fake pockets
Size: 3X-Large, Color: Light Grey
Fake zippers with no pockets, but nice shirt.
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Reviewed in the United States on February 22, 2026
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Amazon Customer
Louisville, US
★★★★★ 5
Nice Men's Shirt
Size: X-Large, Color: Grey
My husband loves this shirt. It is comfortable and fits him perfectly!
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Reviewed in the United States on March 20, 2026
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Traveler
Massapequa, US
★★★★★ 3
read the fine print
Size: X-Large, Color: Black
I really need to learn to read the small print. That pocket line on the chest turned out to be a fake pocket and the actual; zipper on the sleeve is also a fake pocket; my bad but in my defense I'd never dreamed that anyone would put either on a shirt. Also my search term was men's "cotton shirt w/ pocket shirt" and it brought up this polyester wonder. But at least it fits well and seems well made.
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Reviewed in the United States on November 20, 2025
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Brian Andrew Martin
Grantham, US
★★★★★ 5
High‑style look that feels way more expensive than it is.
Size: X-Large, Color: Orange
Okay, let’s talk about this shirt because I was not expecting to love it as much as I do. The Men’s Long Sleeve Polo Shirt with the quarter‑zip is giving premium designer energy without the designer price tag. From the moment I put it on, the fit was chef’s kiss—slim, clean, and athletic without feeling tight. The fabric has that smooth, high‑end feel you usually only get from brands that make your wallet cry. But here? You’re getting elevated style at a totally reasonable price.
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Reviewed in the United States on December 30, 2025

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