TEIN GSB14-8UAS2 Street Basis Z Coilover Kit

The TEIN GSB14-8UAS2 Street Basis Z Coilover Kit represents an evolution in affordable, high-performance suspension technology. Released in 2016, this kit incorporates TEIN's proven suspension technologies made more affordable through streamlined manufacturing processes and a fully sealed damper structure. Designed as an entry-level coilover system without compromising quality, the Street Basis Z delivers improved handling and an aggressive stance for daily drivers and enthusiasts alike.

Key Features:

• Twin-tube shock system provides longer stroke with smaller repulsive force compared to mono-tube systems, resulting in high ride comfort
• Thread-type ride height adjustment with non-adjustable damping force, uses OEM top mounts
• Adjustable ride height lowering range of 1-3 inches
• Cold-formed SAE9254 steel springs with minimum tensile strength of 200 kgf/mm² for outstanding sag resistance and extreme resiliency
• ZT Coating surface treatment on ride height adjustment threads provides abrasion resistance and enhanced corrosion protection
• Durable powder coating ensures superior rust protection that won't peel or flake
• Non-EDFC compatible design for simplified operation

Technical Specifications:

• Front Spring Rate: 336 lbs/in (6.0 kgf/mm)
• Rear Spring Rate: 280 lbs/in (5.0 kgf/mm)
• Front Spring Size: 225mm length / 70mm inner diameter
• Rear Spring Size: 250mm length
• Ride Height Range (Front): -2.7" to +0.1"
• Ride Height Range (Rear): -2.7" to +1.2"

The shortened shell case design provides optimum damper stroke at lower than standard vehicle ride height, with adjustment via the ZT coated threaded sleeve. This coilover system utilizes the vehicle's original upper mounts (not included), making installation straightforward while keeping costs down. The Street Basis Z is ideal for enthusiasts seeking a perfect balance between performance handling, comfortable daily driving, and adjustable ride height without the complexity of damping adjustment.