Tein GSTJ0-8UAS2 Street Basis Z Coilover Kit 2019-2023 Toyota Corolla Hatchback

Vehicle Fitment

• 2019-2023 Toyota Corolla Hatchback 5-Door (MZEA12L Engine, FWD)

Fitment Notes

• Designed for the MZEA12L-equipped 5-door Corolla Hatchback - confirm engine code before ordering
• Uses the vehicle's factory upper mounts, which are not included - OEM upper mounts must be reused or replaced separately
• Ride height adjustment is via threaded lower spring seat - independent of spring preload
• Not available in Japan - developed specifically for the US/Americas market
• Damping is fixed (non-adjustable) - this is a ride-height-adjustable kit only

Features

• Thread-type full-length ride height adjustment - lower spring seat moves up or down along the ZT-coated threaded sleeve for precise, consistent height setting without affecting spring preload
• Twin-tube damper construction provides longer stroke and lower repulsive force compared to mono-tube designs, improving ride compliance on rough or uneven road surfaces
• Matched spring and damper valving developed by Tein specifically for this application - eliminates the guesswork of pairing separate springs with a performance shock
• Shortened shell case design optimises damper stroke at lowered ride heights, maintaining adequate travel and ride quality when the vehicle is lowered within the recommended range
• High-performance Tein damper oil for stable viscosity and consistent damping characteristics across temperature ranges
• ZT Coating surface treatment on threaded sleeve for corrosion resistance and long-term thread durability
• Steel construction with TEIN-green powder coating for durability and corrosion resistance

Specifications

• Part Type: Coilover Kit - Shock Absorber and Spring (4 corners)
• Series: Street Basis Z
• Damper Type: Twin-tube, fixed damping
• Front Spring Rate: 280 lb/in (5 kgF/mm)
• Rear Spring Rate: 263 lb/in (4.7 kgF/mm)
• Front Lowering Range: 1.0 in. - 3.0 in. below stock
• Rear Lowering Range: 1.0 in. - 3.0 in. below stock
• Damping Adjustment: Fixed (non-adjustable)
• Upper Mounts: Not included - OEM upper mounts required
• Body Material: Steel
• Warranty: 1 year (defect and sag - covers over 5mm sag, breakage, deformity, and noise; excludes powder coat finish and rusting)

Included Components

• 4x Shock Absorbers with Integrated Springs
• Tein Silencer Rubbers (application-dependent)
• 1x Warranty Information and Bump Stop Reference Guide

Product Description

The Tein Street Basis Z (GSTJ0-8UAS2) is an entry-level height-adjustable coilover kit for the 2019-2023 Toyota Corolla Hatchback (MZEA12L, 5-door). It is designed for daily-driven vehicles where the primary goal is an improved stance and modest handling upgrade without sacrificing the ride compliance needed for everyday street use. Unlike a generic lowering spring, the Street Basis Z pairs Tein-matched springs with purpose-valved dampers in a single system, removing the guesswork of spring-to-damper compatibility that comes with mixing separate components from different manufacturers.

Ride height is adjusted via the threaded lower spring seat on the ZT-coated sleeve - a straightforward adjustment that changes vehicle height without altering spring preload. The lowering range of 1.0 to 3.0 inches front and rear gives a wide stance window, and Tein's shortened shell case design ensures adequate damper stroke is maintained at lowered heights. The twin-tube internal layout provides a smoother, more compliant ride on rough pavement compared to mono-tube alternatives at similar price points. The kit installs using the factory upper mounts, which must be transferred from the OEM struts. Backed by a 1-year Tein warranty covering manufacturing defects and spring sag exceeding 5mm.