Tein GST76-81SS2 Street Basis Z Coilovers 1998-2005 Lexus GS300 GS400 GS430 RWD

Vehicle Fitment

• 1998-2005 Lexus GS300 (JZS160L, RWD, 3.0L 2JZ-GE I6)
• 1998-2000 Lexus GS400 (UZS160L, RWD, 4.0L 1UZ-FE V8)
• 2001-2005 Lexus GS430 (UZS190L, RWD, 4.3L 3UZ-FE V8)

Fitment Notes

• Fits the 2nd generation Lexus GS (S160 platform) across all three available engine configurations - 3.0L I6, 4.0L V8, and 4.3L V8
• RWD only - does NOT fit AWD GS variants
• Does NOT fit the 2006+ Lexus GS (S190 platform - 3rd generation)
• OEM upper mounts (front and rear) must be reused - upper mounts are NOT included with this kit
• Damping force is fixed (non-adjustable) - factory-calibrated by Tein for this application
• Camber adjustment is not available with this kit - OEM geometry is retained at the top mount
• Lowering ranges differ between the GS300 and GS400/GS430 due to stock ride height differences - see Specifications for per-model drop heights

Features

• Height-adjustable coilover system - threaded lower collar and ZT-coated spring seat allow precise ride height setting within the full lowering range
• Twin-tube damper construction delivers longer stroke with lower initial repulsive force compared to mono-tube designs, providing superior daily-use ride comfort at lowered heights
• Fully sealed crimped damper structure - shell pipe is narrowed, oil and gas injected, and sealed by metal crimping for a compact, durable, and cost-effective build
• Fixed damping factory-calibrated by Tein engineers for the S160 GS platform - matched spring and damper setup installed and ready with no user tuning required
• Stiffer front spring rate (10.0 kgf/mm) accounts for the heavier nose weight of the 2JZ-GE and UZ-series engine-equipped GS models
• ZT-coated threaded sleeve resists corrosion and ensures smooth, consistent collar adjustment throughout the product's service life
• SAE9254 cold-formed springs with minimum tensile strength of 200 kgf/mm² - sag-proof, extremely resilient, and durable in all conditions
• Powder-coated spring finish is chip-resistant and corrosion-resistant
• High-performance damper oil maintains stable viscosity across a wide temperature range with anti-foaming and anti-cavitation properties for sustained sport driving
• Ergonomic long-handled flanged adjustment wrenches included for easier, more controlled collar adjustment
• Shortened shell case provides optimum damper stroke at reduced ride heights for consistent ride quality when lowered
• Manufactured in Japan to strict Tein quality control standards

Specifications

• Part Number: GST76-81SS2
• Product Line: Street Basis Z (SBZ)
• Part Type: Coilover Damper Kit (Full Set - Front and Rear)
• Vehicle Platforms: Lexus GS JZS160L (GS300, 1998-2005); UZS160L (GS400, 1998-2000); UZS190L (GS430, 2001-2005)
• Damper Type: Twin-Tube
• Damping Adjustment: Fixed (Non-Adjustable)
• Height Adjustment: Thread-Type (Lower Spring Seat)
• Spring Rate (Front): 10.0 kgf/mm (560 lb/in)
• Spring Rate (Rear): 9.0 kgf/mm (504 lb/in)
• Rear Spring Free Length: 225mm
• Rear Spring Inner Diameter: 70-90mm
• Spring Material: SAE9254 Cold-Formed Steel (Min. 200 kgf/mm² Tensile Strength)
• Spring Finish: Powder Coated
• Sleeve Coating: ZT (Corrosion Resistant)
• Upper Mounts (Front): OEM Reuse Required - NOT Included
• Upper Mounts (Rear): OEM Reuse Required - NOT Included
• Lowering Range - GS300 (JZS160L): Front 0.3 in.-3.5 in. / Rear 0.7 in.-3.5 in.
• Lowering Range - GS400 (UZS160L): Front 0.5 in.-3.7 in. / Rear 0.9 in.-3.7 in.
• Lowering Range - GS430 (UZS190L): Front 0.5 in.-3.7 in. / Rear 0.9 in.-3.7 in.
• Drivetrain: RWD
• Position: Front and Rear (Full Kit - 4 Dampers)
• Quantity: 4 (Complete Set)
• Country of Manufacture: Japan
• Warranty: 1-Year Limited (through authorized Tein dealers)

Included Components

• 2x Front Coilover Assemblies (Left and Right)
• 2x Rear Coilover Assemblies (Left and Right)
• 1x Set of Adjustment Wrenches (Ergonomic Long-Handle, Flanged)
• 1x Installation Hardware

Product Description

The Tein Street Basis Z (Part #GST76-81SS2) is a height-adjustable coilover kit engineered for the 2nd generation Lexus GS (S160 platform), covering the 1998-2005 GS300 (JZS160L, 2JZ-GE 3.0L I6), 1998-2000 GS400 (UZS160L, 1UZ-FE 4.0L V8), and 2001-2005 GS430 (UZS190L, 3UZ-FE 4.3L V8) - all RWD configurations. The spring rates reflect the front-heavy weight distribution common to inline-six and V8-powered luxury sport sedans: 10.0 kgf/mm (560 lb/in) front and 9.0 kgf/mm (504 lb/in) rear. These rates are paired to a fixed damping calibration by Tein engineers, delivering a performance-oriented setup that manages the GS's front weight bias without requiring any damper adjustment from the owner. The height range for the GS300 (front 0.3"-3.5", rear 0.7"-3.5") is slightly narrower than the GS400/GS430 range (front 0.5"-3.7", rear 0.9"-3.7"), reflecting differences in stock ride height between the inline-six and V8 variants.

The twin-tube damper architecture provides the stroke length and compliance needed to keep the GS comfortable over urban road imperfections and highway expansion joints even when set significantly lower than factory. The fully sealed crimped damper structure is compact and durable, and the ZT-coated threaded sleeve ensures smooth, consistent collar adjustment that resists corrosion even in coastal or winter road conditions. All installation uses the vehicle's existing OEM upper mounts at both front and rear, which are not included in this kit. The shortened shell case design maintains adequate damper travel at lowered ride heights, preserving suspension function and ride quality within the intended adjustment range.

This kit is strictly for the S160-generation GS (2nd generation, 1998-2005) and does not fit the 2006+ GS (S190, 3rd generation) or any AWD variant. Manufactured in Japan to Tein's strict quality control standards, with SAE9254 cold-formed springs and high-performance viscosity-stable damper oil, and backed by a 1-year limited warranty through authorized Tein dealers, the Street Basis Z GST76-81SS2 is a proven, cost-effective height-adjustable suspension solution for owners of the Lexus S160 GS who want meaningful stance control without sacrificing the refined ride character that defines the GS lineup.