TEIN GSA16-9USS2 Street Advance Z Coilover Kit - Twin Tube Adjustable Suspension

The TEIN Street Advance Z represents the evolution of TEIN's popular suspension technology, combining performance-focused engineering with affordability. This complete coilover damper kit features a fully sealed twin-tube design that delivers an optimal balance between street comfort and spirited driving capability.

Key Features:

• Twin-Tube Design: Provides longer stroke and smoother operation compared to mono-tube systems, resulting in superior ride quality on varied road surfaces
• 16-Way Damping Force Adjustment: Features TEIN's Advance Needle technology for precise tuning of compression and rebound characteristics
• Thread-Type Height Adjustment: Easily adjustable ride height via threaded lower spring seat collars with recommended lowering range of 1.5" to 2.25"
• ZT Coating Treatment: Special abrasion-resistant coating on threaded sleeves protects against gravel, debris, and corrosion
• Spring Rates: Front 9 kgf/mm, Rear 4 kgf/mm - conservatively tuned for enhanced cornering and weight transfer management
• EDFC Compatible: Optional electronic damping force controller allows adjustment from the driver's seat
• SAE9254 Steel Springs: Cold-formed springs with durable powder coating for superior rust protection and resilience
• High-Performance Damper Oil: Maintains stable viscosity across temperature ranges with excellent anti-foaming properties

The Street Advance Z utilizes OEM upper mounts and features a shortened shell case design for optimum damper stroke at lowered ride heights. While this model uses a sealed damper structure (non-rebuildable), replacement tubes are available at reasonable cost. Manufactured in Yokohama, Japan, TEIN coilovers are engineered specifically for regional road conditions and driving demands.

This complete front and rear suspension kit includes everything needed for installation, delivering an aggressive stance with improved handling characteristics while maintaining excellent daily drivability and ground clearance for typical road obstacles.