Performance M
STX Coilover Kit - 1-series (F20, F21); (1K2, 1K4) 2WD; without electronic dampers max. allowed axle weight in kg Front: -1090
STX Coilover Kit - 1-series (F20, F21); (1K2, 1K4) 2WD; without electronic dampers max. allowed axle weight in kg Front: -1090
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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Give your BMW 1 Series the stance, grip and confidence it deserves with a premium height-adjustable suspension upgrade engineered by the KW group under the ST brand. Perfect for cars without factory adaptive damping.
This complete spring and damper package is compatible with BMW 1 Series hatchback models on the F20 and F21 platforms, including 3-door and 5-door RWD variants coded 1K2 and 1K4. Approved axle loads: front 921 to 1090 kg, rear up to 1230 kg. Ride-height adjustment range: front approximately 25 to 50 mm, rear approximately 30 to 55 mm within the tested window.
We have fitted this kit for customers and on our own builds. The feedback is consistently positive: sharper turn-in, flatter cornering, and a purposeful drop without ruining everyday comfort. If you want a clean, even drop and a genuine handling upgrade on UK roads, this is the one.
Why enthusiasts choose this adjustable suspension kit
- Stepless ride-height tuning via a robust composite adjuster collar for a precise front and rear drop.
- Galvanised damper bodies with an additional protective coating for strong corrosion resistance in all seasons.
- Twin-tube dampers with low-friction internals and a chrome-plated piston rod for durability and consistent performance.
- Multiple seal package and dust protection help keep the mechanism clean and operating smoothly.
- Developed alongside KW Germany for sporty road dynamics with confident high-speed stability.
- Complete kit with matched springs, adjustable spring perches and bump stops for an OE-quality fit.
What you will feel
- Reduced body roll and a more planted rear end under hard acceleration and quick direction changes.
- Improved steering response and grip that inspires confidence on B-roads and motorway commutes.
- A tidy, level stance that complements OEM wheels or aftermarket setups.
Fitment notes
- For models without electronic damping control.
- Stay within the stated load and height ranges for best results and clearance.
Professional installation
Want it fitted right first time? Book expert installation and alignment with MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a tailored quote and setup advice.
Search-friendly compatibility and key terms
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