SKU: 28508644470

HELIX CFMK100 BMW.3 - 4"-100mm BMW Speaker Adapter Rings

Sale price$16.19 Regular price$17.99
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USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 10 - Jul 15

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Description

HELIX CFMK100 BMW.3 - 4"-100mm BMW Speaker Adapter RingsHELIX CFMK100 BMW. 3 FlexMount is our patented mounting system, based on specially developed adaptor rings. With just one turn, your universal 4" 100 mm HELIX COMPOSE midrange speaker with FlexMount100 technology becomes car specific, allowing an easy and acoustically optimized installation in the original mounting position of the vehicle. Features Vehicle specific adapter ring for a professional and acoustically optimized integration of the 4 100 mm

HELIX CFMK100 BMW.3

FlexMount is our patented mounting system, based on specially developed adaptor rings.
With just one turn, your universal 4" / 100 mm HELIX COMPOSE midrange speaker with FlexMount100 technology becomes car-specific, allowing an easy and acoustically optimized installation in the original mounting position of the vehicle.

Features

  • Vehicle-specific adapter ring for a professional and acoustically optimized integration of the 4” / 100 mm HELIX COMPOSE midrange with FlexMount100 Technology in the original mounting location of the vehicle
  • Easy installation and secure fixation of the midrange in the adaptor ring thanks to patented bayonet lock
  • Complex construction for high stability, durability and optimized acoustic characteristics
  • Including:
    • Gaskets to prevent acoustic short circuits
    • FlexConnect inlay C for BMW, Mini, Ferrari and Rolls Royce

Compatibility

Speaker:

  • Ci7 M100FM-S3
  • Ci3 M100FM-S3
  • Ci3 K100.2FM-S3
  • Ci3 C100.2FM-S3

Car models:

  • Suitable for BMW and Mini vehicles with factory installed midrange
  • Further information about the vehicle compatibility can be found in our FlexMount Finder

FlexConnect Inlay C:

  • BMW
  • Mini
  • Ferrari
  • Rolls Royce
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: 28508644470

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Michael
Lake Worth, US
★★★★★ 4
Very warm.
Size: 13.5-14.5 Women/12-13 Men, Color: Navy Blue
Very warm and comfortable. A little difficult to put on with the collared top.
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Reviewed in the United States on January 19, 2026
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Cheryl
Battle Creek, US
★★★★★ 5
You won't be sorry
Size: 10.5-11.5 Women/9-10 Men, Color: Black
Great padding for comfort and terrific warmth. I bought a pair of Acorns 30 years ago and still have them. Updated to a new color and now feel the benefit of newer padding! I used the sizing listed for shoes and like the roominess for thicker sox. Well made and a joy to put on. (Wisconsin)
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Reviewed in the United States on December 25, 2025
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Bureau of Review
Omaha, US
★★★★★ 5
Great Slippers
Size: 12-13 Women/10.5-11.5 Men, Color: Charcoal
Comfy, great price, looks great, fits well, size aligned, great quality. Love these slippers.
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Reviewed in the United States on February 16, 2026
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Amazon Customer
Natrona Heights, US
★★★★★ 5
Extremely comfortable, leather sole. Hard to find a style.
Size: 13.5-14.5 Women/12-13 Men, Color: Navy Blue, Size: 13.5-14.5 Women/12-13 Men, Color: Navy Blue
Totally worth the price. This type of style is very hard to find, my husband had another pair a few years ago that he was never able to replace. These fit his wide feet and are very comfortable. The elastic at the ankle is not too tight. So glad I was able to find him a replacement. We bought the blue in a size 12. Love the fact that they are washable.
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Reviewed in the United States on February 12, 2026
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Michael Arnhold
Louisville, US
★★★★★ 5
Very comfortable Slippers. Great buy!
Size: 12-13 Women/10.5-11.5 Men, Color: Charcoal
I bought these to replace a pair of slippers that I have had for years that are very similar to the slippers I bought, but I had worn a hole in the leather on mine, so I had to find something new and similar. These slippers are worth the money they are very comfortable, and I am sure they will last for years. They are a little tight around the ankle cuff but they are still new and I am sure they will wear in a little more when I start wearing them more.
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Reviewed in the United States on March 8, 2025

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