ST Suspensions X Coilovers - Nissan 350Z, Infiniti G35 2003-2008

The ST X coilover kit gives the 2003-2008 Nissan 350Z and 2003-2007 Infiniti G35 adjustable ride height with fixed (non-adjustable) damping, tuned by KW Automotive in Germany for everyday street use. Both axles lower 0.4 to 1.6 inches (10-40mm) using a friction-optimized polyamide composite spring perch with a stainless-steel insert, so height changes are smooth and the strut resists corrosion. The galvanized steel strut housings, multi-layer pressure-resistant seal package and integrated dust-protection bump stop are built to hold up to daily driving, and each kit is application-specific and dyno-tested by hand.

Specifications

Documents: Installation Instructions (PDF)

This part fits:

Shipping

• In-stock orders placed before 3 PM EST ship the same day — everything else ships within 24 hours.
• Standard, expedited, and overnight options at checkout.
• Oversized items ship by freight and take longer.
• Backordered items ship as soon as stock lands — contact us for lead times.
• International orders: prices do not include VAT, duties, or import fees. Your country charges these at import and they are the buyer’s responsibility.

Returns

• 30-day returns on new, uninstalled items in original packaging with all hardware.
• Standard returns: 8% restocking fee, buyer pays return shipping. Both waived if the item is defective or we made the error.
• Installed or used parts can’t be returned — confirm fitment before you install.
• Special orders and custom items are final sale.
• Email us for return authorization before shipping anything back.

Full details: Shipping Policy · Refund Policy