ST 03-08 Infinity G35 Coupe 3.5L / 03-08 Nissan 350z Coupe (Z33) 3.5L XTA Adjustable Coilovers

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. 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. ST Coilover Kits enable you to individually adjust the ride height of your car to improve the appearance and driving behavior. Depending on your selection, ST coilover kits offer a wide range of adjustments giving you the tools needed to dial them into your requirements.

• 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.
• 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.
• 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.
• 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.
• Linear race spring system provides a consistent response while driving and makes it easy to swap rates to further personalize your setup.
• Aluminum unibal top mounts improve steering response and feedback while allowing you to dial in your camber when applicable.
• ST XTA coilovers feature adjustable rebound damping which puts you in control of how comfortable or sporty your car feels.
• Galvanized steel housing for improved resistance to corrosion.
• 5 Year Limited Warranty - Unlimited Mileage
• Made in Germany

Upgrade the handling and stance of your 2003-2008 Infiniti G35 Coupe or Nissan 350Z Coupe with ST Suspensions XTA Adjustable Coilovers, part number STS18285802. Designed for sporty drivers who want greater control over ride height and driving dynamics, this coilover system combines linear race springs, adjustable dampers, and aluminum unibal top mounts. The adjustable setup lets you fine-tune the vehicle’s appearance, cornering behavior, and overall response to suit street or performance-oriented driving.
The ST XTA coilovers feature 16 distinct clicks of adjustable rebound damping, allowing you to tailor the balance between comfort and sporty handling with a simple adjustment. The system arrives with factory-recommended damper settings validated on KW shock dynos, and the included setup manual makes it easy to return to those settings whenever needed. Aluminum unibal top mounts improve steering response and feedback while providing front camber adjustment where applicable, helping optimize tire contact and accommodate aggressive wheel and tire fitment.
Durability and serviceability are built into the ST XTA design. Galvanized steel struts provide corrosion resistance, while the wear-resistant polyamide composite spring perch and stainless steel insert support smooth, long-lasting ride-height adjustment. The dust protection system, elastomer bump stops, pressure-resistant sealing package, monoblock guide system, and low-friction piston band help protect the damper components from water, dirt, and road debris. Each damper is hand-built and tested by KW specialists in Germany before packaging. This kit is made in Germany and includes a 5-year limited warranty with unlimited mileage.

Features:

• Vehicle Compatibility: Fits 2003-2008 Infiniti G35 Coupe and 2003-2008 Nissan 350Z Coupe with 3.5L engines

• Adjustable Rebound Damping: Provides 16 distinct settings for tuning comfort and sporty handling

• Linear Race Springs: Deliver consistent suspension response and support further spring-rate customization

• Adjustable Ride Height: Composite spring perches and trapezoidal threads enable smooth, precise stance adjustment

• Aluminum Unibal Top Mounts: Improve steering response and provide front camber adjustment where applicable

• Corrosion Protection: Galvanized steel struts and corrosion-resistant composite spring perches support long-term durability

• Dust Protection System: Helps shield piston rods, seals, and internal damper components from water and road debris

• Quality Tested: Dampers are hand-built and shock-dyno tested by KW specialists in Germany

• Warranty: Includes a 5-year limited warranty with unlimited mileage

• Manufacturing Origin: Made in Germany