ST Suspensions ST X Coilover Kit

Part No: 13245014
Fixed Damping

Fits:

• 2005–2007 Subaru WRX STI (GD Chassis)

⚠️ Please allow 5–10 business days to build and ship.

The ST Suspensions ST X Coilover Kit is a fixed-damping performance suspension designed to improve handling, stance, and overall driving feel for the 05–07 STI. Factory-preset valving delivers sporty performance without the need for manual adjustment, making this an ideal upgrade for enthusiasts who want enhanced control with everyday drivability.

Built with galvanized steel strut housings for corrosion resistance and long-lasting durability, the ST X kit offers a dependable suspension solution without complexity.

Lowering Range

• Front: ~0.8″ – 2.0″

• Rear: ~0.8″ – 2.0″

Adjustable height allows you to dial in stance and tuning while maintaining proper shock travel.

Spring Rates (Verified for Part #13245014)

• Front: 400 lbs/in (~7.14 kg/mm)

• Rear: 285 lbs/in (~5.09 kg/mm)

These spring rates deliver a firmer, more controlled ride with reduced body roll and improved handling compared to stock suspension — while still suitable for street use.

Key Features

• Height Adjustable – Customize ride height to your preference

• Factory Pre-Set Damping – Sport-tuned performance right out of the box

• Twin-Tube Damper Design – Balanced ride quality and control

• Galvanized Steel Construction – Enhanced corrosion resistance

• Direct Bolt-On Fitment – Designed specifically for 2005–2007 STI

Performance Benefits

• Enhanced cornering stability

• Sharper steering feedback

• Reduced squat and dive under acceleration/braking

• Lowered stance without compromise

Why Choose ST X for Your 05-07 STI?

The ST X Coilover Kit is a straightforward, no-hassle suspension upgrade that provides noticeable handling gains and improved stance over stock suspension — perfect for daily driving or performance-oriented street use.