ST Suspensions ST X Coilover Kit

Part No: 13245016
Fixed Damping

Fits: 2008–2014 Subaru STI (GR/GV)

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

The ST X Coilover Kit is a proven suspension upgrade for the 2008–2014 STI, delivering improved handling, sharper steering response, and an aggressive stance without the need for adjustable damping.

With factory pre-set valving engineered specifically for the GR/GV STI chassis, the ST X provides a sporty yet street-friendly ride right out of the box — ideal for daily driving, spirited canyon runs, and weekend builds.

Manufactured in Germany, galvanized steel strut housings provide strong corrosion resistance and long-term durability.

Lowering Range

• Front: 0.8" – 2.0"

• Rear: 0.8" – 2.0"

Spring Rates (Verified for Part #13245016)

• Front: 400 lbs/in (≈ 7.14 kg/mm)

• Rear: 285 lbs/in (≈ 5.09 kg/mm)

This setup delivers a noticeably firmer, performance-oriented feel compared to stock while maintaining proper balance for street use and controlled cornering.

Key Features

• Height Adjustable – Dial in your desired stance while maintaining shock travel

• Factory Pre-Set Damping – Sport-tuned valving optimized for the STI chassis

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

• Galvanized Steel Construction – Durable and corrosion-resistant

• Direct Bolt-On Installation – Designed specifically for 2008–2014 STI

Why Choose ST X for Your 08–14 STI?

If you want a clean drop, sharper handling, and reliable German-engineered performance without the complexity of adjustable dampers, the ST X is a straightforward and dependable suspension upgrade for your GR/GV STI build.