TEIN GSA28-8USS2 Street Basis Z Coilover Kit

The TEIN Street Basis Z represents the latest generation of TEIN's popular Street Basis suspension system, incorporating proven technologies in an affordable package thanks to streamlined manufacturing processes and a fully sealed damper structure. The main difference between the Basis Z and the Basis is that the new Basis Z features non-rebuildable coilovers, reducing manufacturing costs since most users do not rebuild their coilovers.

Key Features:

• Spring Rates: 7 kgf/mm front (392 lb/in), 9 kgf/mm rear (504 lb/in)
• Height adjustable via thread-type adjustment with no damping adjustment
• Twin-tube design, uses OE mounts, non-EDFC compatible
• Maximum lowering: 3.6" front and 4.1" rear (2002-2004 models)
• Springs cold formed with SAE9254 steel with minimum tensile strength of 200 kgf/mm²
• Superior rust protection ensured with highly durable powder coating that does not peel or flake

The twin-tube system attains longer stroke with smaller repulsive force compared to mono-tube systems, requiring shock absorbers with ample stroke that operate smoothly, allowing you to negotiate gaps and bumps steadily on rough roads for a smooth ride at low speed and stability at high speed. TEIN's unique ZT Coating surface treatment on the ride height adjustment thread is abrasion resistant against gravel and debris while enhancing corrosion resistance.

This setup is perfect for daily drivers looking for increased handling performance without compromising comfort, with TEIN selecting appropriate spring rates and valving dampers to match—eliminating guesswork in trying to match one brand of springs to another brand of shock absorbers. All TEIN lowering springs and coilovers are manufactured and assembled in TEIN's factory based in Yokohama, Japan.