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Mini Cooper Stage 1 Suspension Upgrade Kit Gen3 F56 F55 F57

Mini Cooper Stage 1 Suspension Upgrade Kit Gen3 F56 F55 F57

Mini Cooper Stage 1 Suspension Upgrade Kit Gen3 F56 F55 F57
Selected: Stage 1
Part No: G3NMK4000
Specially Priced. Discounts Do Not Apply.
Fits the following:
MINI (2002-Current)
Select variations below for more information:
Alternate Products
Mini Cooper Suspension Stage Kits KW Gen3 F56 thru 2019
Mini Cooper Suspension Stage Kits KW Gen3 F56 thru 2019

The Stage 1 Suspension Upgrade Kit blends the racing performance experience of Mini Mania with the demands of the enthusiastic MINI street driver.  Aggressive 'lowered' look with much improved handling! 

Fits the following models:

2014-2021 F56 MINI Cooper and Cooper S Hardtop
2015-2021 F55 MINI Cooper and Cooper S Hardtop 4-Door
2016-2021 F57 MINI Cooper and Cooper S Convertible

Kit includes:

  • Performance Lowering Springs
  • 22mm Rear Anti-Sway Bar

MINI did a wonderful job with the handling on the new 3rd generation F-series MINI, but their design is on the conservative side to appeal to the widest segment of the market.  This leaves room for improvement for the 'enthusiast' type driver.

When we talk about 'improving' the suspension, we always begin with a larger rear sway bar.  This upgrade reduces the inherent 'understeer' built into the car for safety and provides a more 'balanced' car.  This allows you to carry more speed into and out of the corner while keeping the car 'flatter' in the corners.  

The Lowering Springs lowers the center of gravity allowing a quicker turn-in response and also helps to keep the car flatter in the corner.


Front wheel drive cars naturally understeer from the factory, even the MINIs. The NM Engineering Solid 22mm Rear Anti Sway Bar improves your F-chassis MINI by enducing more oversteer and increasing the car handling predictability.

NM Eng Anti Sway Bar features:

  • mandrel bent solid chromoly bar providing consistent diameter through out for precise torsioning motion
  • forged ends (not cheaply welded plate) with two adjustment mounting holes 
  • graphite impregnated urethane bushing
  • glossy blue powder coat finish

See NM Rear Sway Bar installation instructions here.


NM Engineering's RS Alpha progressive rate spring kits provide a responsive ride, sharper handling characteristics and lowered ride height. Using exacting spring rates and precision manufacturing techniques, RSa springs provide a more pleasurable motoring experience.

Lowering Rate:

B46/48 (2.0T)
Front: 33mm (1.30")
Rear: 31mm (1.22")

B38 (1.5T)
Front: 30mm (1.2")
Rear: 30mm (1.2")

Drop rates may slightly vary depending on transmission type and fuel level.

Notes:  Finish : Powder Coated NM Blue

Related Technical Articles:
Performance Upgrade Kits for F55 and F56 Mini Coopers
Created: October 28, 2015
Mini Cooper Performance Upgrade Kits including Engine Upgrade kits and Suspension Upgrade Kits.