ST Suspensions X Coilover Height-Adjustable Kit – 2004+ Porsche Boxster (987) | KW-Engineered Dampers | Street-Focused Performance

The ST Suspensions X Coilover Kit for the 2004+ Porsche Boxster (987) is a complete height-adjustable coilover kit engineered for the everyday performance driver — delivering a lowered stance, improved handling, and precise ride height adjustability while retaining the road comfort required for daily use. The ST X Coilover is built on KW-engineered dampers — ST Suspensions relies exclusively on KW's world-class damper engineering for all ST X Coilover kits, ensuring the damper quality and calibration that the Boxster's mid-engine chassis demands. Application-specific valving and spring rates are developed for the 987 Boxster platform — not a generic coilover adapted to fit. ST Suspensions is a KW Group brand — one of the most respected suspension brands in the European performance aftermarket.

Key Features:

• KW-engineered dampers — all ST X Coilover dampers are engineered by KW — world-class damper engineering from one of the most respected suspension brands in Europe, delivered at the ST Suspensions price point
• Height adjustability — wide range of ride height adjustment via the adjustable spring perch — set the correct ride height for your specific Boxster build and driving use
• Polyamide composite spring perch with stainless steel insert — the adjustable spring perch is manufactured from a durable, friction-optimized polyamide composite material with a stainless steel insert — the composite material prevents corrosion between the strut and perch for long-lasting, smooth height adjustability
• Galvanized zinc-coated steel struts — galvanized zinc coating on the steel struts provides optimized corrosion protection for long-lasting use in all weather conditions
• Dust protection system — a dedicated dust protection system prevents dirt and particulate from contacting the hardened chrome piston rod or entering the valve packs — protecting the damper's internal components for long-term reliability
• Multi-layered sealing package — pressure-resistant multi-layered sealing package, mono block guide system, and low-friction piston band working inside the pressure-resistant internal damper housing — ST Suspensions' engineering approach to damper longevity and consistent performance
• Application-specific calibration — spring rates, damper valving, and geometry are developed specifically for the 987 Boxster platform — correct for the Boxster's mid-engine weight distribution and suspension geometry
• Street-focused performance — developed for the everyday driver who wants improved handling and a lowered stance without sacrificing road comfort for daily use

ST X Coilover — The Street Performance Philosophy:

The ST X Coilover is ST Suspensions' entry-level coilover — designed for drivers who want the benefits of a coilover suspension (height adjustability, improved handling, lowered stance) without the complexity of damping adjustment. The ST X delivers precise height adjustment and improved handling over the factory suspension, with a street-focused calibration that retains road comfort for daily driving. For Boxster owners who want a clean, lowered stance and improved handling without the cost and complexity of a fully adjustable coilover, the ST X is the correct choice. The KW-engineered dampers ensure that the ST X's performance and durability are backed by the same engineering expertise that underpins KW's own coilover lineup.

KW Engineering — Why It Matters:

ST Suspensions is a KW Group brand — and as a matter of principle, ST Suspensions relies on KW's world-class damper engineering for all ST X Coilover kits. KW is one of the most respected suspension brands in the world — a German brand with decades of motorsport and performance suspension development experience. The KW-engineered dampers in the ST X Coilover bring that engineering expertise to the ST price point — ensuring that the damper quality, valving, and calibration are correct for the specific application rather than a generic compromise.

987 Boxster — Platform Context:

The 2004+ Porsche Boxster (987) is one of the most driver-focused sports cars ever produced — a mid-engine roadster with near-perfect weight distribution and a chassis that rewards precise suspension tuning. The 987's mid-engine layout means that suspension geometry and spring/damper calibration have a particularly significant effect on handling balance — the ST X's application-specific development for the 987 platform ensures that the coilover's calibration is correct for the Boxster's unique weight distribution and suspension geometry.

Specifications:

• Brand: ST Suspensions (KW Group)
• Part Number: STS13271016
• Barcode: 847691048498
• Damper Engineering: KW
• Adjustment: Ride height (spring perch)
• Spring Perch: Polyamide composite with stainless steel insert
• Strut Coating: Galvanized zinc
• Application: 2004+ Porsche Boxster — 987 chassis
• Weight: 46.1 lbs (shipping weight)

Fitment Information:

• 2004+ Porsche Boxster — 987 chassis — all engine variants
• Application-specific — developed for the 987 Boxster's suspension geometry and weight distribution
• Note: Verify your specific Boxster model year and variant before ordering — confirm that STS13271016 is the correct ST X kit for your specific 987 configuration. A four-wheel alignment is required after coilover installation. Professional installation by an experienced Porsche suspension specialist strongly recommended.

What's Included:

• ST Suspensions X Coilover front assemblies (pair)
• ST Suspensions X Coilover rear assemblies (pair)
• All required mounting hardware
• Refer to ST Suspensions' product documentation for complete kit contents and installation specifications

Installation Notes:

• Professional installation by an experienced Porsche suspension specialist strongly recommended — coilover installation on the 987 Boxster requires correct torque specifications, correct spring perch height setting, and a four-wheel alignment after installation
• A four-wheel alignment is required after coilover installation — do not drive the vehicle at speed before a full alignment is performed
• Set ride height with the vehicle at kerb weight for accurate measurement — lock the spring perch securely after setting the desired ride height
• Inspect all suspension components (control arm bushings, ball joints, tie rod ends) before installation — worn components should be replaced alongside the coilovers
• Refer to ST Suspensions' installation documentation for complete installation specifications and torque values

Why ST Suspensions?

ST Suspensions is a KW Group brand — one of the most respected suspension brands in the European performance aftermarket. ST Suspensions' X Coilover lineup brings KW's damper engineering expertise to a more accessible price point — application-specific development, KW-engineered dampers, and quality construction for drivers who want a genuine performance coilover without the cost of KW's own lineup. For 987 Boxster owners who want a quality height-adjustable coilover from a brand with proven Porsche suspension credentials, ST Suspensions X is the correct choice.

Perfect For:

• 2004+ Porsche Boxster (987) owners who want a height-adjustable coilover with KW-engineered dampers, application-specific calibration, and a street-focused performance character for daily driving and spirited use
• 987 Boxster builds where a lowered stance, improved handling, and long-term coilover reliability are required from a quality European suspension brand
• Owners who want ST Suspensions' KW-backed engineering at the ST price point — the correct entry-level coilover for the 987 Boxster platform

Note: Four-wheel alignment required after installation. Set ride height at kerb weight. Lock spring perch securely after height adjustment. Inspect all suspension components before installation. Professional installation strongly recommended. Verify 987 Boxster model year and variant before ordering.