ST Suspension
ST Suspension Coilovers for BMW and PorscheShop ST Suspension coilovers for performance road cars and track-focused builds. Backed by KW Automotive engineering, the ST range gives enthusiasts several levels of suspension adjustment, including ST X, XA, XTA and XTA Plus packages across BMW and Porsche applications.ST Coilovers for BMW M CarsBMW fitments include the ST XTA Plus coilover kit for...
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ST Suspension Coilovers for BMW and Porsche
Shop ST Suspension coilovers for performance road cars and track-focused builds. Backed by KW Automotive engineering, the ST range gives enthusiasts several levels of suspension adjustment, including ST X, XA, XTA and XTA Plus packages across BMW and Porsche applications.
ST Coilovers for BMW M Cars
BMW fitments include the ST XTA Plus coilover kit for BMW F80 M3 and F82/F83 M4, ST XTA Plus 3 coilovers for BMW F87 M2 and M2 Competition and ST XTA Plus coilovers for BMW E90/E92 M3.
ST Coilovers for BMW M135i, M140i, M235i and M240i
For F2X and related BMW platforms, choose from options such as ST XA coilovers and the more highly adjustable ST XTA Plus 3 coilovers.
ST Suspension for Porsche 987
The range also includes ST XA coilovers for Porsche Boxster and Cayman 987 and ST X coilovers for Porsche Boxster and Cayman 987.
Check electronic damper compatibility, axle-load notes and the exact chassis specification before ordering. After fitting coilovers, a full geometry check is strongly recommended.
ST X vs XA vs XTA vs XTA plus 3: buying questions
Which ST coilover has the adjustment I need?
- ST X: adjustable ride height with fixed damping.
- ST XA: ride-height and rebound-damping adjustment.
- ST XTA: rebound adjustment with adjustable top mounts and the application-specific spring package.
- ST XTA plus 3: separate rebound, low-speed compression and high-speed compression controls, with adjustable top mounts.
Kit contents and approvals remain specific to the vehicle and part number.
Is ST XTA plus 3 the same as ST XA?
No. XA and XTA plus 3 have different adjustment formats and hardware. Compare the exact series as well as the chassis, rather than choosing by the ST name alone.
Which ST coilovers can I compare for a Porsche 987?
Our listings include ST X 13271016 and ST XA 18271016 for the stated Boxster/Cayman 987 applications. X has fixed damping; XA adds rebound adjustment. Confirm the precise derivative and factory suspension before ordering.
What should BMW E90/E92 M3 owners check?
Confirm whether the car has EDC, then select the corresponding part and any required cancellation hardware. Do not treat an EDC cancellation module as retained electronic damper adjustment.
Which ST kit should I consider for repeated track days?
Compare the XTA and XTA plus 3 specification against your tyre, alignment and setup needs. Additional damping controls are useful when you can test and record changes. Arrange professional installation and geometry setup.
Browse the BMW M135i/M140i XTA plus 3 listing or return to the coilover suspension range.
ST X, XA, XTA & XTA Plus 3 Explained
Read our ST X vs XA vs XTA vs XTA plus 3 guide for damping adjustment, top-mount, EDC and road/track differences.