TEIN GSMA8-91AS3 Street Advance Z Coilover Kit

The TEIN Street Advance Z Coilover Kit represents the evolution of TEIN's popular Super Street series, engineered to deliver an optimal balance of performance, comfort, and adjustability for street-driven vehicles. This complete coilover system features advanced twin-tube damper construction with 16-way damping force adjustment, allowing drivers to fine-tune compression and rebound settings to match their driving style and road conditions.

Key Features:

• Twin-tube internal construction with 22mm piston diameter for improved stroke length and ride comfort
• 16-level damping force adjustment using Advance Needle technology for over 200% increase in damping force range compared to previous models
• Full-length ride height adjustment via ZT-coated threaded sleeve for superior corrosion and abrasion resistance
• Shortened shell case design provides optimum damper stroke at lowered ride heights
• TEIN-green powder coating with patented 2-Layer, 1-Bake method for exceptional durability and rust protection
• SAE9254 steel springs (minimum 200 kgf/mm² tensile strength) with powder coating for sag-proof performance
• Full-length dust boots to protect piston rods from debris and damage
• Aluminum spring seats with Delrin thrust washers for smooth adjustment
• Compatible with EDFC electronic damping force controller (sold separately)
• Uses original equipment upper mounts (not included)

The Street Advance Z coilovers are designed for enthusiasts seeking improved handling and aggressive stance without sacrificing daily drivability. The twin-tube design delivers longer stroke with reduced repulsive force compared to monotube systems, ensuring excellent ride quality on varied road surfaces. TEIN's high-performance damper oil maintains stable viscosity across a broad temperature range and resists cavitation, providing consistent performance for both daily commuting and spirited driving. Each kit is manufactured in TEIN's Yokohama, Japan facility and backed by a 1-year manufacturer's defect warranty.