Looking for maximum performance for your car? Our adjustable ST XTA Coilover kits are the upgrade you need. All ST XTA systems are delivered with a linear race springs system, adjustable dampers, and aluminum unibal camber adjustable top mounts. ST XTA Coilover kits deliver precise adjustment to your ride height so you control the look of your car. We manufacture the adjustable spring perch made of durable and friction-optimized polyamide composite material with a stainless steel insert. Thanks to the composite material corrosion is prevented between the strut and perch ensuring long lasting height adjustability while the stainless steel insert provides strength and confidence! ST XTA Coilovers come preset to our factory recommended damper settings, the same configuration we test them at on our KW shock dynos before they go into your box. The 16 distinct clicks of adjustable rebound damping allow you to refine the driving dynamics with a simple turn of the adjustment knob. Each kit includes a detailed damper setup manual making it easy to reset to our recommended setting at any time. Whether your preference is comfort, performance, or something in between; ST XTA puts the finer details of the driving dynamics in your hands. The top mounts included with our ST XTA Coilover kits allow you to adjust the camber at the front axle to dial in aggressive wheel and tire fitment. They also allow you to maximize the tire's contact patch for driving in fast corners and any other driving scenario that demands maximum grip. Galvanized zinc coated steel struts optimize corrosion protection for long lasting use. We add a dust protection system to prevent unwanted dirt and particulate from coming in contact with the hardened chrome piston rod or getting into the valve packs. We reinforce the system with a multi-layered pressure resistant sealing package, mono block guide system and a low friction piston band which works inside the pressure resistant internal damper housing.

Additional Information

ST XTA Coilovers allow you to maximize the driving dynamics of your car if you are a sporty ambitious driver. With the linear race springs, adjustable dampers, and aluminum unibal top mounts, you can dail in the cars behavior easily.

Application Summary

2008-2013 BMW 1 Series (E82) Coupe 128i+135i

Part Type

Coilover Adjustable Spring Lowering Kit

Features and Benefits

• 5 Year Limited Warranty - Unlimited Mileage
• Aluminum unibal top mounts improve steering response and feedback while allowing you to dial in your camber when applicable.
• Composite spring perch made from wear-resistant, friction-optimized polyamide composite with an embedded stainless-steel insert. The polyamide composite prevents oxidation while the stainless-steel insert maximizes strength.
• Elastomer Bump stop with integrated dust protection system prevents water and dirt particles reaching the piston rod and seals. The highly resilient bump stops act as dynamic load limiters while maintaining ride quality and durability.
• Galvanized steel housing for improved resistance to corrosion.
• Linear race spring system provides a consistent response while driving and makes it easy to swap rates to further personalize your setup.
• Made in Germany
• Seamless Ride Height Adjustment - ST's composite spring perch and unique trapezoidal thread pitch make ride height adjustability a breeze so you can dial in your preferred look.
• ST coilovers are built by hand by the experts at KW in Fichtenberg, Germany. Each damper is tested on a shock dyno to verify it's making the proper forces before being put into the ST box.
• ST XTA coilovers feature adjustable rebound damping which puts you in control of how comfortable or sporty your car feels.

Product Downloads

#	Document Type	Download
1.	Installation Instructions

Installation guides, warranty details, and other supporting documents are provided by the supplier. In some cases, these files may originate from regions outside your locale, meaning instructions, warranty procedures, and images may not fully align with your specific vehicle or region (e.g., LHD vs. RHD differences, return policies, etc.). If you need clarification, please contact a StreetFX support agent.

• 5 Year Limited Warranty - Unlimited Mileage
• Aluminum unibal top mounts improve steering response and feedback while allowing you to dial in your camber when applicable.
• Composite spring perch made from wear-resistant, friction-optimized polyamide composite with an embedded stainless-steel insert. The polyamide composite prevents oxidation while the stainless-steel insert maximizes strength.
• Elastomer Bump stop with integrated dust protection system prevents water and dirt particles reaching the piston rod and seals. The highly resilient bump stops act as dynamic load limiters while maintaining ride quality and durability.
• Galvanized steel housing for improved resistance to corrosion.
• Linear race spring system provides a consistent response while driving and makes it easy to swap rates to further personalize your setup.
• Made in Germany
• Seamless Ride Height Adjustment - ST's composite spring perch and unique trapezoidal thread pitch make ride height adjustability a breeze so you can dial in your preferred look.
• ST coilovers are built by hand by the experts at KW in Fichtenberg, Germany. Each damper is tested on a shock dyno to verify it's making the proper forces before being put into the ST box.
• ST XTA coilovers feature adjustable rebound damping which puts you in control of how comfortable or sporty your car feels.

ST Suspensions ST XTA coilover kits feature KW damping technology, which allows the suspension to be made either stiffer or softer depending on the driving conditions. This damping adjustment is made on the upper end of the chromed piston rod allowing the setup to be changed almost instantly. If the rebound force is increased, the car will drive with more track stability and reduced body roll. If the rebound force is decreased, the car will feel more comfortable when on the move. For increased performance, these ST XTA coilover kits feature an aluminum adjustable top mount allowing the camber and caster to be adjusted depending on your driving needs or vehicle setup.

No specific fitment data available for this part. For clarification, please contact us.

Detailed Compatibility

This may not be an exhaustive list of compatible vehicles. Please reach out to one of our representatives if you are unsure or do not see your vehicle here.