ST Suspensions
ST Suspension BMW F30 F32 COILOVER KIT ST X (335ix, 340ix, 435ix & 440ix)
ST Suspension BMW F30 F32 COILOVER KIT ST X (335ix, 340ix, 435ix & 440ix)
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ST X Height-Adjustable Suspension for BMW F30/F32 xDrive
Dial in the perfect stance and sharper road manners on your xDrive 3 Series or 4 Series with the ST X height-adjustable suspension set. Engineered by KW Automotive, this street-focused spring and damper package brings precise ride-height control, reduced body roll and a confident, planted feel without sacrificing daily comfort. It is a proven chassis upgrade for drivers who want their BMW to sit right and drive even better.
Why this kit is a brilliant upgrade
- Height-adjustable ride: easily fine-tune the drop using the robust polyamide spring perch on the galvanised strut body.
- Sporty handling, real-world comfort: twin-tube dampers with low-friction internals deliver agile turn-in and stable high-speed composure.
- Built to last: corrosion-resistant galvanised struts with additional coating, chrome-plated piston rods and a high-quality seal package.
- Complete solution: includes adjustable spring plates, performance springs, bump stops and dust protection for a tidy, OE-style install.
- Designed with KW Germany expertise for consistent quality and longevity.
Lowering range
- Front: 1.2 in to 2.4 in (approx. 30 to 60 mm)
- Rear: 1.4 in to 2.4 in (approx. 35 to 60 mm)
Vehicle fitment
For BMW xDrive models:
- 3 Series F30 (2013–2018): 335i xDrive, 340i xDrive
- 4 Series F32 (2014–2020): 435d xDrive, 435i xDrive, 440i xDrive
Key specifications
- Version: ST X
- Damping adjustment: None
- Construction: Twin-tube dampers
- Strut material: Galvanised steel with additional corrosion protection
Part number
1322000S
Notes
Vehicles equipped with electronic damping require deactivation of the factory control. Deactivation kit: KW Part-no. 68510301.
Real-world results from MJ Modifications
We have installed this setup on customer F30 and F32 xDrive cars at MJ Modifications in Warwickshire. Feedback has been excellent: a clean, even drop, far more confidence on B-roads, and a taut, precise feel in fast corners while remaining comfortable for everyday driving.
Professional fitting available
Want it fitted correctly and aligned for street or fast-road use? Book installation with MJ Modifications, Warwickshire. Email info@mjmodifications.co.uk for a quote.
Manufacturer and warranty
Manufactured by ST Suspension. Two-year manufacturer warranty.
Search-friendly terms
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