When it comes to upgrading your car’s suspension, ST Suspension has built a strong reputation among enthusiasts for delivering performance-focused components at an accessible price point. Originally founded in Southern California in the late 1970s, under the name Suspension Techniques, the brand quickly became known in the tuning scene. Renowned for lowering springs and sway bars, they soon expanded into a full range of suspension upgrades. Today, as part of KW Automotive, ST combines German engineering with decades of aftermarket experience to offer coilovers, sport suspensions, adjustable springs, and wheel spacers. Designed to improve both handling and stance, their product range is built for everyday drivers and performance enthusiasts alike.
ST Suspension coilovers are designed to enhance both the performance and appearance of your vehicle. Developed and manufactured in Germany, these coilover kits provide height adjustability and model-specific tuning to suit a wide range of vehicles. Whether you’re looking to improve cornering stability on the road, or prepare for occasional track use, the range offers varying levels of adjustability and performance features. With technologies such as progressive springs, corrosion-resistant galvanized struts, and adjustable damping, ST Suspension coilovers allow drivers to customise both the stance and handling of their car for a more dynamic driving experience.
The ST Suspension Coilover Range
Before going into each coilover that ST offer, below is a quick summary of what they are best for, including adjustment and their features;
| Coilover | Best For | Damping Adjustment |
| ST X | Road | Fixed |
| ST XA | Road | 1 Way |
| ST XTA | Road & Track | 1 Way |
| ST XTA PLUS 3 | Road & Track | 3 Way |
| Feature | ST X | ST XA | ST XTA | ST XTA PLUS 3 |
| Composite Spring Perch | Y | Y | Y | Y |
| Galvanized Strut Housing | Y | Y | Y | Y |
| Dust Cover / Bump Stop | Y | Y | Y | Y |
| Adjustable Rebound Damping | – | Y | Y | Y |
| Adjustable Unibal Top Mounts | – | – | Y | Y |
| Race Spring System | – | – | Y | Y |
| Low & Highspeed Compression Damping | – | – | – | Y |
ST X
The ST X Coilovers are designed as an entry point into performance suspension upgrades. Offering improved handling and adjustable ride height, they are for everyday drivers and enthusiasts alike. With stepless height adjustment, drivers can lower their vehicle to achieve the perfect stance and improved cornering stability. The dampers come with a fixed performance-focused tuning, meaning they’re already set up to provide a firmer, more responsive feel through corners, while still being comfortable enough for daily driving.
The kit features galvanized steel strut housings for strong corrosion protection, helping the suspension withstand harsh road conditions. ST also uses polyamide composite spring perches with stainless steel inserts to prevent corrosion and maintain smooth height adjustment even after years of use. Paired with progressive springs that balance comfort and performance, ST X coilovers are a straightforward way for drivers to achieve better road feel, sharper cornering, and that lowered stance every enthusiast loves.
ST XA
For drivers who want more control over how their car feels on the road, the ST XA Coilovers offer a great balance between customization, performance, and daily usability. Alongside stepless ride-height adjustment, the ST XA kit introduces 16-way adjustable rebound damping. This allows you to fine-tune how your car behaves on the road; from a firmer, more responsive setup for spirited driving to a slightly softer configuration for everyday comfort. Each kit comes with a factory-preset damper setup designed specifically for the vehicle, so you already start with a well-balanced base before making your own adjustments.
The suspension also features progressive springs for a mix of comfort and sportiness, galvanized steel strut housings for corrosion resistance, and polyamide composite spring perches. Again, with stainless steel inserts that help prevent corrosion while maintaining smooth height adjustment over time. Altogether, the ST XA coilovers give drivers the ability to dial in both the stance and the driving feel of their car. This makes them a strong choice for enthusiasts who want more control over their suspension setup.
ST XTA
If you’re the kind of enthusiast who wants to go beyond simply lowering your car, the ST XTA Coilovers bring a much more track-focused setup to the table. Along with stepless ride-height adjustment and 16-click rebound damping, the XTA kit includes adjustable aluminum unibal top mounts. These allow you to dial in front camber for better grip and sharper turn-in when pushing the car through corners. This added alignment control makes a noticeable difference for spirited driving or occasional track days, helping maximize tyre contact and front-end response.
The suspension also uses a two-piece motorsport-inspired spring setup with a linear main spring, giving the car a more precise and predictable feel underload. They are built with galvanized steel strut housings and corrosion-resistant composite spring perches. For enthusiasts chasing a lower stance, more aggressive alignment, and a suspension setup they can properly fine-tune, the ST XTA coilovers are where things start to get serious.
ST XTA PLUS 3
For enthusiasts who want maximum control over their suspension setup, the ST XTA Plus 3 Coilovers sit at the top of the ST range and bring serious track-inspired adjustability to the road. Along with stepless ride-height adjustment and adjustable camber via aluminum unibal top mounts, the XTA Plus 3 introduces three-way adjustable damping. This includes 16-click rebound adjustment and independent low and high-speed compression damping, with 24 clicks each. This level of tuning allows drivers to fine-tune how your car reacts to cornering, braking, sharp bumps and kerbs on track.
A two-piece motorsport-style linear race spring system keeps the suspension predictable and consistent when pushing hard. Additionally, galvanized strut housings and composite spring perches with stainless steel inserts help maintain durability and smooth height adjustment over time. For enthusiasts chasing the ultimate combination of aggressive stance, track-ready handling, and full suspension tuning, the ST XTA Plus 3 coilovers deliver the most advanced setup in the ST lineup.
Finally…
This concludes the range of coilovers that ST Suspension has to offer. Hopefully you now have a better understanding of their range, what they are for, the differences between them and how they can enhance your driving experience.
View the full range online at Demon Tweeks, where you can further enter your vehicle details to see what options are available for you.
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