TEIN GSQ74-91AS2 Street Advance Z Coilovers for 2006-2017 Lexus IS RWD

Vehicle Fitment

• 2006-2017 Lexus IS250 (GSE20/GSE30, RWD, 2.5L I4)
• 2015-2016 Lexus IS200t (ASE30, RWD, 2.0L I4)
• 2014-2017 Lexus IS350 (GSE31, RWD, 3.5L V6)
• Also fits Lexus IS300h (AVE30, RWD hybrid) with modified clearances

Features

• TEIN Street Advance Z performance coilover suspension kit
• Twin-tube damper design optimized for everyday comfort and spirited driving
• 16-stage adjustable damping force for tailored ride feel and handling
• ZT-coated threaded spring seats for durable ride height adjustment
• Powder-coated damper bodies for corrosion resistance
• Full-length dust protections to shield piston rods
• OEM upper mount reuse for easier installation
• Compatible with TEIN EDFC electronic damping control (motor kit sold separately)

Specifications

• Part Number: GSQ74-91AS2
• Front Spring Rate: approx. 8 kgf/mm (≈448 lbs/in)
• Rear Spring Rate: approx. 9 kgf/mm (≈504 lbs/in)
• Damping Force: 16-way adjustable (front & rear)
• Ride Height Adjustment: via ZT-coated threaded sleeves
• Front Adjustable Range: approx. -20 mm (-0.8") to -91 mm (-3.6")
• Rear Adjustable Range: approx. -3 mm (-0.1") to -60 mm (-2.4")
• Upper Mounts: Reuse OEM front & rear
• EDFC Compatible: Yes (controller sold separately)

Included Components

• 2x Front coilover assemblies
• 2x Rear coilover assemblies
• 4x Adjustable spring seats
• 4x Spring locks
• 4x Full-length dust boots
• 2x Hook spanners
• 4x Delrin thrust washers
• Instruction manual

Product Description

The TEIN Street Advance Z Coilover Kit (Part No. GSQ74-91AS2) is a performance-oriented suspension upgrade designed for rear-wheel-drive Lexus IS models spanning the 2006-2017 model years, including the IS250, IS200t, IS350, and hybrid IS300h platforms. This Street Advance Z series brings precision tuning to ride height and damping control with its 16-stage adjustable damping system and durable ZT-coated threaded spring seats, giving you the ability to fine-tune handling and stance for spirited street driving or daily use.

Built around a corrosion-resistant twin-tube damper design with OEM upper mount reuse, the Street Advance Z coilovers deliver a comfortable yet responsive ride compared to stock suspension. Ride height is adjustable over a wide range, allowing for subtle lowering or a more aggressive stance depending on your goals. The kit is also compatible with TEIN's optional EDFC (Electronic Damping Force Controller) system for convenient in-car damping adjustments (controller sold separately), making this a flexible and tunable suspension solution for Lexus IS enthusiasts.