Performance M
STXA Coilover Kit - 4-series (F32, F33, F36); (3C) convertible; 2WD without electronic dampers max. allowed axle weight in kg Front: -1025
STXA Coilover Kit - 4-series (F32, F33, F36); (3C) convertible; 2WD without electronic dampers max. allowed axle weight in kg Front: -1025
Heads-up on cancellations & returns: if you cancel an order or return an item, you won't get back 100% of what you paid. We apply a 10% restocking fee, the outbound shipping is non-refundable, and we have to pass on Shopify / PayPal payment processing fees; these aren't returned to us when we refund you. International orders also lose on exchange-rate spread in both directions. If the original packaging is damaged or missing, a reboxing charge applies. For international orders specifically, if you refuse to pay our shipping invoice or supply a prepaid label after placing the order, the same deductions apply. We're upfront about this — please be sure of your purchase before ordering.
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Unlock precision handling, a purposeful drop, and everyday comfort with this height and damping adjustable sports suspension kit for the BMW 4 Series. Built with KW Automotive expertise for ST Suspensions, it delivers fast-road control and track-day confidence while keeping ride quality refined for British roads.
Vehicle compatibility
- BMW 4 Series F32 Coupe, F33 Cabriolet, F36 Gran Coupe
- Rear-wheel-drive models without factory adaptive damping
- Maximum permitted axle loads: front 961 to 1025 kg, rear up to 1265 kg
Lowering range
- Front: 40 to 65 mm
- Rear: 40 to 65 mm
Why choose this upgrade
- Externally adjustable rebound damping so you can fine-tune comfort and control in minutes
- KW twin-tube damper technology with low-friction internals for crisp response and stability
- Galvanised struts with additional coating for long-term corrosion protection
- Threaded height adjustment on both axles within the TUV-tested range
- Complete kit with vehicle-specific springs, adjustable spring seats, bump stops and dust boots
Real-world results
We have fitted this setup to customer cars and our own builds. Feedback is consistently positive, highlighting sharper turn-in, reduced body roll and improved confidence without sacrificing daily drivability. It is a superb choice for fast-road use and occasional track days, as well as achieving a clean, even stance.
Fitting and support
Professional installation recommended. MJ Modifications in Warwickshire can supply and fit this kit for you. For a tailored quote, email info@mjmodifications.co.uk.
Good to know
- Engineered by KW Automotive exclusively for ST Suspensions
- External rebound adjustment located at the top of the piston rod for quick changes
- Pressure-resistant damper housings and multi-lip sealing for durability in all weather
- Please verify axle loads and model details before ordering
What drivers search for
BMW 4 Series suspension upgrade, BMW F32 adjustable suspension, F33 cabriolet lowering kit, F36 Gran Coupe suspension kit, height adjustable struts, rebound adjustable shocks, performance suspension, sports shocks and springs, street and track setup, fast-road coilover system, RWD handling upgrade, non-adaptive damper cars, cornering grip improvement, stance and handling package, KW engineered dampers, ST Suspensions XA.
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