SKU: 90757027569

For BMW 550i 11-15 Free Flow 304 SS Axle-Back Exhaust System w Quad Rear Exit

Sale price$1079.97 Regular price$1199.97
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Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Sep 30 - Oct 5

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Description

For BMW 550i 11-15 Free Flow 304 SS Axle-Back Exhaust System w Quad Rear ExitOverview: Dinan's Free Flow Axle Back Exhaust improves exhaust flow by reducing back pressure, resulting in increased power output and a great sporty sound that is civilized when you want it to be and pleasantly aggressive under harder acceleration with zero drone. 100% stainless steel construction and exacting specifications ensure that the system fits correctly using the factory hangers and will resist corrosion for years to come. A vacuum

Overview:

Dinan's Free Flow Axle-Back Exhaust improves exhaust flow by reducing back pressure, resulting in increased power output and a great sporty sound that is civilized when you want it to be and pleasantly aggressive under harder acceleration with zero drone. 100% stainless steel construction and exacting specifications ensure that the system fits correctly using the factory hangers and will resist corrosion for years to come. A vacuum controlled butterfly valve is utilized to improve flow at wide-open throttle while keeping things civilized and "drone" free throughout. The design reduces overall weight as well and features 3.5'' polished, or ceramic black, tips for a tasteful high-performance look.

Features:

  • More Power: + 10 HP when coupled with engine software
  • Drone abatement technologies used to reduce cabin resonance
  • Enjoyably louder, sportier sound
  • Quad 3.5" laser engraved, polished or ceramic black 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
2011 - 2015 BMW 550i xDrive 4.4L V8
2011 - 2015 BMW 550i 4.4L V8

Specs:

Brand Dinan
Dinan Point Value 3
Emission Code 5
Height 10
Labor Time (Hours) 1.6
Length 54
Material 304 Stainless Steel
Max HP Gain 10
Product Type Axle-Back Exhaust
Sound Level Aggressive / Moderate
System Type Axle-back
Warning California Proposition 65
Weight 78
Width 29
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: 90757027569

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4.5 ★★★★★
Based on 25 reviews
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G
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GD
Houston, US
★★★★★ 1
Wouldn’t recommend these sandals.
I was really excited to try the Steve Madden Women's Wafer Heeled Sandals, but unfortunately, I’m disappointed with the quality. The sandals look great in photos, but when I received them, I noticed that the materials felt cheap and not as durable as I expected from a brand like Steve Madden. The straps are stiff, and they rubbed against my skin, causing discomfort after only a short amount of time. The fit also wasn’t great — they felt a bit tight, especially around the toes, which made them hard to wear for longer periods. While the heel height is cute, the overall construction doesn’t seem to provide enough support, which made walking in them less comfortable than I anticipated. For the price, I expected better quality and comfort. Unfortunately, I wouldn’t recommend these sandals.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 9, 2025
A
Verified Purchase
Andi
Waukegan, US
★★★★★ 5
Perfect black patent leather heel
Size: 6.5, Color: Black Patent
Definitely go up an entire size in these. I used to work at Steve Madden and can tell you with 100% confidence if you're ever buying one of their heels with a pointier toe, you need to go up an entire size or your foot is going to suffer. These are a perfect "high" stiletto, they're definitely not low and I wouldn't say they're a breeze to walk in unless you're used to heels. I will vouch for how comfortable they are though given the height and the shape - they're as comfortable as a heel like this could be for sure! If you have skinnier ankles, definitely recommend punching an extra hole in the strap.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 18, 2025
P
Verified Purchase
Pamela
Phoenix, US
★★★★★ 4
toe strap is tewww tight
Size: 8, Color: Black
I love the look of these heels, they’re super classy, elegant, simple, and most importantly I chose these because of the small platform at the base of the heel for a less painful experience. The onlyyyyyy issue I have is that the toe strap is so close to the front and tight (as you can see)!! I got the correct size but wish I didn’t have to stretch them out (which is almost impossible because that leather is stiff). The shoe is not very bendable but I personally like it because the shoe is sturdy.
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Reviewed in the United States on November 11, 2024
L
Verified Purchase
LensP
Lexington, US
★★★★★ 2
Poor Quality for the Cost !!! Dissatisfied
Disappointed Durability. I love these heels they are very comfortable looks good with just about any color outfit . However, my heart ripped in pieces after 3 months with limited wear they began to lift and fall apart . I’m very dissatisfied with the cost & poor quality slippers I received. I wish I could actually returned it but couldn’t due to the 30 days return policy.
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Reviewed in the United States on March 22, 2026
B
Verified Purchase
Blair Bear
Birmingham, US
★★★★★ 5
Steve Madden must have
Size: 7.5, Color: Black
You can’t go wrong with any Steve Madden shoe to be honest. These are sexy yet sturdy. Nice thin versatile heel. Strap length is good for any size ankle really
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 20, 2025

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