When we presented our ST XTA plus 3 coilover suspension kit for the first time at the “Virtual KW automotive Expo” at the end of 2020, we seemed to have captured the spirit of the times: so much suspension for comparatively little money. Now, the ST XTA plus 3, including parts certificate, is available for all BMW 3 Series (E9x) with rear-wheel drive—i.e., E90, E91, E92, and E93!
The special feature of the ST XTA plus 3 coilover suspension kit is similar to the well-known KW V4 and KW V4 Clubsport coilover kits. It can be adjusted independently in the three driving dynamics parameters: high-speed compression, low-speed compression, and low-speed rebound. This gives you even more leeway to refine the vehicle-specific and always preset setup further.
If you don’t need something like this, you’re probably forgetting that manually adjustable dampers offer much more scope for perfect damping thanks to their valve technology alone. The adjustable interplay of high-speed and low-speed compression valves, the two-stage rebound valves, and the damper design can create a damper characteristic that leaves little to be desired.
Some high-performance cars get from factory three-way adjustable dampers or as an option for a reason: to give drivers ultimate control over handling and ride.
KW wasn’t messing around when we built a fancy three-way adjustable suspension for the BMW M4 GTS (F82). That project paved the way for our popular KW V4 coilover kit. And the ST XTA plus 3? Let’s just say we took things to the next level with that one.
The ST XTA plus 3 coilover suspension strikes a balance between the KW V4 Clubsport and KW V4 offerings. It features linear racing springs, aluminum Unibal bearings, and a slightly stiffer design for enhanced performance. This translates to an exceptional price-to-performance ratio, making it a compelling option for many drivers.
The ST XTA plus 3 coilover suspension elevates the driving dynamics of all BMW 3 Series models (E90 Sedan, E91 Touring, E92 Coupe, and E93 Convertible). This performance-focused suspension system surpasses the capabilities of a standard setup, delivering a noticeably more engaging and responsive driving experience. It’s sporty character will appeal to driving enthusiasts, offering exceptional handling that extends beyond the limitations of everyday driving.
Despite its firm, sporty character, the ST XTA plus 3 effectively absorbs bumps encountered on rough country roads thanks to its independently adjustable high-speed and low-speed compression damping. This translates to a noticeably smoother ride than typical competitor options within the ST suspension market segment, even handling imperfections like one-sided concrete road joints with impressive control.
Both high-speed and low-speed compression damping are independently fine-tunable on the ST XTA plus 3 with a wide range of 0 to 24 clicks. The wide range of adjustability and improved rear-axle traction will undoubtedly please petrolheads, particularly those devoted to the BMW cars.
The ST XTA plus 3 delivers noticeably sharper steering for the BMW M3 (E90, E92, E93) thanks to its sportier rebound settings and Unibal top mounts. Even everyday 318i drivers will experience a significant improvement in steering responsiveness, making their familiar BMW 3 Series feel more agile and connected. Additionally, the low-speed rebound damping is adjustable within a range of 0 to 16 clicks for further fine-tuning.
If you have made an incorrect adjustment, you can always click back to the basic setup or the delivery state, thanks to the adjustment instructions supplied. You can also download the adjustment instructions from the online store on our ST homepage.
As the ST XTA plus 3 is a coilover suspension, you can use it to continuously lower your BMW 3 Series — within the limits of the parts certificate.
While the BMW E90, E91, and E93 with rear-wheel drive can be lowered from 30 to 60 millimeters on both axles with the ST coilover suspension, the approved lowering range for the BMW E92 is 20 to 50 millimeters.
The BMW M3 models (E90, E92, E93), already lowered ex-works, can be lowered by between 10 and 40 millimeters at the front and rear with the ST XTA plus 3 coilover suspensions.
Like all ST coilover springs and ST coilover suspensions, the ST XTA plus 3 coilover suspension is part of the “Make it Yours” program. The XTA plus 3 coilover suspension can be ordered in 18 different surface colors from specialist dealers and directly from the suspension manufacturer. In addition, the springs can also be individually labeled — all this can be done directly via our online store (www.st-suspensions.net) or directly from our specialist dealers.
