ST XA Coilovers Galvanized Steel (Damping Adjustment) - G26 M440i xDrive
Whether small car, compact model, sports car or muscle car, with the suspension products and components from ST you can turn your car into a real game changer. State-of-the-art suspension technology backed by KW engineering, a strong price-performance ratio and a wide range of customisation options give you exactly the driving experience you want – and make ST the first choice for anyone who wants more.
Suitable for all-wheel-drive BMW 4 Series G26 Gran Coupe (420d xDrive Mild Hybrid, 430d xDrive Mild Hybrid, 430i xDrive, M440i xDrive Mild Hybrid) models only. Refer to the model/variant list at the bottom of this page for full compatibility.
Electronic damping control must be deactivated. A suitable KW deactivation kit is NOT included.
WHAT'S INCLUDED
Set FA coilover struts, RA springs with height adjustment + dampers.
OPTIONAL ACCESSORIES
KW EDC Cancellation Kit (68511086) — sold separately. Required for vehicles with factory electronic damping (EDC).
Images are for illustration purposes only. The appearance and components shown may vary for your vehicle.
Make your ST suspension your own with your choice of spring colour and a personalised marking. Create a finish that reflects your style, with customisation available on selected ST coilover and height-adjustable spring kits. Lowering has never been so individual.
SPRING COLOUR
Choose from 18 spring colours, including the standard ST yellow, to complement your vehicle.
SPRING MARKING
Add your own wording to the springs with an individual marking of up to 25 letters. Your personal marking is additional to the manufacturer’s identification markings.
Select your preferred customisations from the product options when ordering. Additional charges apply to custom colours and spring markings.
Please allow additional production and delivery time for customised orders.
Product Information
ABOUT ST XA COILOVERS
ST XA Coilovers give you control over both your car’s stance and its driving character. Combining adjustable lowering with KW rebound damping technology, they let you refine the suspension response to suit your preferences.
Supplied with a recommended damper setting for your vehicle, ST XA provides a starting point that you can personalise for a firmer, sportier feel or a more comfort-oriented response.
MORE THAN JUST LOWERING
The 16-click rebound adjustment controls how strongly the dampers resist the suspension extending after compression. This allows you to influence body movements and the way the car responds to changes in the road.
Increasing rebound damping gives a firmer, more controlled response, while reducing it allows a more compliant feel. Compression damping remains preset, keeping the adjustment process focused and manageable.
RIDE HEIGHT TO SUIT YOUR BUILD
ST XA offers continuous height adjustment within the kit’s specified range. The threaded adjusters let you fine-tune the stance after installation, including when changing your wheel and tyre combination.
Ride height and rebound damping are adjusted separately, giving you control over both appearance and driving feel.
KW TECHNOLOGY, BUILT FOR REGULAR USE
Manufactured by KW automotive, ST XA combines twin-tube damper technology with galvanised steel strut housings and additional sealing for corrosion protection.
Composite spring seats with stainless steel inserts support lasting height adjustability, while dust protection and bump stops help protect the damper components.
MAKE IT YOURS
Optional spring colours and individual spring markings let you personalise the appearance of your ST XA kit as well as its setup.
Available options are listed on the product page. Customised orders require additional production time.
KEY FEATURES
Complete matched spring and damper upgrade. 16-click adjustable rebound damping. Vehicle-specific recommended damper settings. Continuously adjustable lowering. Galvanised steel strut housings. Composite spring seats, dust protection and bump stops. Optional spring colours and individual markings.
ST XA OR ST X?
ST X offers adjustable lowering with fixed damping developed for your vehicle. It suits drivers who prefer a preset suspension setup.
ST XA adds adjustable rebound damping, allowing you to refine body control and ride response after installation. The main difference is the ability to personalise how the suspension feels, alongside setting the ride height.
Please refer to the Key Details section and model compatibility list for this kit’s lowering range, suspension requirements and fitment restrictions.
Items marked GREEN or 'In Stock' are currently in stock at SouthernBM. Most orders are shipped within 1-2 business days. ‘Click & Collect’ orders are usually ready within 1-2 hours during normal trading hours.
Available to Order
Items marked YELLOW or ‘Available To Order’ are not currently in stock at SouthernBM, and need to be ordered in from the supplier. Please note the expected delivery time before placing an order.
No Longer Available
Items marked RED or ‘No Longer Available’ have been discontinued and are no longer available to be ordered. Please contact us for an alternative.
All orders are dispatched from our Melbourne warehouse. Most orders are delivered within 1-3 business days Australia-wide after dispatch. The expected delivery time on all 'Available To Order' items is only an estimate and wait times may vary from those provided. Please contact us if you have any questions.
All items listed on our website are not available for in store pick up without prior purchase. Please use the ‘Click & Collect’ option at checkout and we will let you know as soon as your order is ready.
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