Tein GSL52-8USS2 Street Basis Z Coilovers 2005-2010 Scion tC ANT10L FWD

Vehicle Fitment

• 2005-2010 Scion tC (ANT10L Chassis, FWD, All Trims)

Fitment Notes

• FWD applications only - fits all trim levels of the first-generation Scion tC (ANT10L) from 2005 through 2010
• Uses the vehicle's factory upper mounts - OEM upper mounts must be transferred from the existing struts; upper mounts are not included
• Damping is fixed (non-adjustable) - this is a ride-height-adjustable-only kit
• Not compatible with Tein EDFC (Electronic Damping Force Controller)
• Front ride height adjustment range: -1.5 in. to -3.9 in. below stock (recommended -2.4 in.)
• Rear ride height adjustment range: -1.4 in. to -4.3 in. below stock

Features

• Thread-type full-length ride height adjustment via ZT-coated threaded sleeve - lower spring seat moves independently of spring preload for accurate, repeatable height setting
• Twin-tube damper construction delivers longer effective stroke and lower repulsive force than mono-tube designs, improving ride comfort on varied road surfaces at lowered heights
• Matched spring and damper valving developed specifically for the ANT10L tC - eliminates the compatibility guesswork of pairing separate spring and shock brands
• Shortened shell case design optimises damper stroke at lowered ride heights, maintaining adequate suspension travel and ride quality within the recommended lowering range
• Cold-formed SAE9254 steel springs with a minimum tensile strength of 200 kgF/mm² - sag-resistant and highly resilient under sustained load
• Dust boots protect the piston rod from damage and keep debris out of the shock absorber body
• TEIN-green powder coating on components using a 2-layer, 1-bake method (Japanese patent no. 4347712) for superior corrosion resistance
• ZT Coating surface treatment on threaded adjustment sleeve for abrasion and corrosion resistance
• High-performance Tein damper oil with stable viscosity across a broad temperature range for consistent damping performance

Specifications

• Part Type: Coilover Kit - Shock Absorber and Spring (4 corners)
• Series: Street Basis Z
• Damper Type: Twin-tube, fixed damping
• Front Spring Rate: 6 kgF/mm (336 lb/in)
• Rear Spring Rate: 9 kgF/mm (504 lb/in)
• Front Lowering Range: ~1.5 in. - 3.9 in. below stock (recommended ~2.4 in.)
• Rear Lowering Range: ~1.4 in. - 4.3 in. below stock
• Damping Adjustment: Fixed (non-adjustable)
• EDFC Compatible: No
• Upper Mounts: Not included - OEM upper mounts required
• Spring I.D.: 70 mm (front and rear)
• Spring Material: SAE9254 cold-formed steel
• Warranty: 1 year (manufacturing defect and sag over 5mm; excludes powder coat finish and rusting)

Included Components

• 4x Coilover Assemblies (shock absorbers with integrated springs)
• 4x Dust Boots
• 1x Warranty Information and Bump Stop Reference Guide

Product Description

The Tein Street Basis Z (GSL52-8USS2) is an entry-level height-adjustable coilover kit for the 2005-2010 Scion tC (ANT10L, FWD). Designed as Tein's most accessible coilover offering, the Street Basis Z is purpose-built for daily-driven tCs where a lowered stance and improved handling are the primary objectives - without the added cost of damping adjustment. The kit pairs purpose-valved twin-tube dampers with Tein-matched springs developed and road-tested specifically for this chassis, removing the compatibility uncertainty that comes with mixing separate component brands.

The ANT10L tC's rear spring rate (9 kgF/mm / 504 lb/in) is notably stiffer than the front (6 kgF/mm / 336 lb/in), which reflects Tein's application-specific tuning to manage the chassis balance of the torsion-beam rear suspension found on this platform. Ride height is adjusted via the ZT-coated threaded lower spring seat across a generous front range of 1.5 to 3.9 inches and a rear range of 1.4 to 4.3 inches below stock. The kit is not EDFC-compatible and uses fixed damping - owners seeking 16-stage adjustable damping on the same platform should consider the Street Advance Z. The kit uses factory upper mounts, which must be transferred from the OEM struts. Backed by Tein's 1-year warranty covering manufacturing defects and spring sag exceeding 5mm.