AST: 4100 Series Coilover Kit: Gen 1
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AST: 4100 Series Coilover Kit: Gen 1

SKU:  ACS-B1301S
WEIGHT:  48.00 lbs
brand: AST
Our price: $1,999.95

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AST is one of the most advanced and high quality suspension manufacturers in the game. Any of their products will leave you completely satisfied and even more in love with your car than you thought possible

The Sportline 1, or 4100 series, is AST's "entry level" product, but this does not mean it is low quality or cheap. Even though it is the cheapest product available for MINIs, it is still leagues better than most other suspension.

  •     Monotube design
  •     Rebound adjustment with one knob.
  •     Adjust platform allows the use to adjust the ride height of your car.
  •     Specially designed to keep maximum stroke, even with a lower ride height, and are finished with a KTL coating for an extremely hardy finish.
Monotube Design

Monotube design is essential for performance. The oil and nitrogen are separated by a floating piston, and allows the use of a larger piston, increasing the damper performance and sensitivity felt by the driver, all this added together produces more grip, gives more control and driver feedback from your vehicle.
What is a rebound adjustment?

Rebound controls the rate of extension of your shock absorber. By changing the rebound you can directly change the characteristics of the vehicle.

Technical specifications:

  •     Floating piston design with high pressure nitrogen eliminates cavitation around the piston.
  •     22mm / 14mm diameter shaft struts, non-inverted.
  •     Steel cylinder body shocks, non-inverted.
  •     Rebound adjustable (''Singles'').
  •     Low friction seal.
  •     Adjuster knobs permanently mounted on the dampers, no need for special tools.
  •     Rubber bushings for ''eye'' shock mounts.
  •     Optional spherical top mounts.
  •     Optional DDP piston (double digressive).
  •     Rebuildable and fully serviceable.
  •     Optional custom valving.

Image shown is a representation of the actual product. Ordered product will have minor difference

This AST: 4100 Coilover Kit: Gen 1 is one of the many MINI Cooper Parts and Accessories that we carry and will fit the following MINI Cooper Models and Years:

Gen1 MINI:

R50 MINI Cooper Hatchback: 2002, 2003, 2004, 2005, 2006

R53 MINI Cooper S Hatchback: 2002, 2003, 2004, 2005, 2006

R52 MINI Cooper Convertible: 2004, 2005, 2006, 2007, 2008

R52 MINI Cooper S Convertible: 2004, 2005, 2006, 2007, 2008

R-Fifty WHAT?? Confused about what model MINI you have? We’re here to help. Check this out for more information.


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Customers' comments


Thank you for all you help and the quick order/delivery of a Countryman spare tire to my hotel in Minneapolis, MN.We are back home safe in Saratoga Springs, NY after delivering my son to U of Minnesota.We have 3 Mini's and you now have a customer for life.

Bob Watkins
Bob Watkins

My hitch for my R53 came in today and 3 hours later it is installed and the car is all back together. The fit and finish are excellent and I couldn't be happier with the product. The only problem I had is that the instructions mention zip ties and replacement trim mount clips but the little Baggie included in my box was empty. Someone forgot to pop the parts into the bag before tossing the bag into the box. Didn't really effect me because I didn't break any trim tabs and I have PLENTY of zip ties.

Thanks for a great and unique product that makes the ownership of our quirky little MINIs even better.

Chili Red Owner #552
David Rigg

Ordered oil change kit for my Mini Cooper. One of the oil containers had leaked throughout the box, soaking everything else, and through the bottom of the box. Made a oily mess. You need to check the caps to make sure they are tight before shipping.
Ernest Anderson

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