Product Overview
TEIN Flex Z Coilovers for Toyota GR Yaris GXPA16
The TEIN Flex Z Coilover Kit VSTN0-C1AA3 is an ideal suspension upgrade for Toyota GR Yaris owners looking for sharper handling, reduced body roll, adjustable ride height and greater control without sacrificing the usability expected from a road-driven performance car.
Designed specifically for the Toyota GR Yaris GXPA16 / XPA1G 1.6-litre turbo AWD, the Flex Z combines TEIN’s extensive suspension development experience with a highly adjustable street-performance coilover package.
Whether you’re building a fast-road GR Yaris, lowering your car for improved stance, preparing for spirited B-road driving or upgrading the suspension for occasional track days, TEIN Flex Z coilovers provide the adjustability required to create a setup suited to your driving requirements.
TEIN states that the GR Yaris-specific setup has been developed to reduce body roll and optimise damping characteristics, improving sporting performance while retaining controlled road manners.
16-Stage Adjustable Damping
The TEIN Flex Z features 16 levels of damping force adjustment, allowing the driver to alter the suspension characteristics to suit different roads and driving styles.
A softer setting can be selected for everyday road driving, while firmer settings can provide increased chassis control during spirited driving or track use.
The damping adjustment affects compression and rebound together, providing a simple way to customise the behaviour of the suspension.
This makes the VSTN0-C1AA3 particularly suitable for owners who use their GR Yaris for more than one purpose.
Full-Length Ride Height Adjustment
Unlike basic lowering springs or conventional height-adjustable suspension, the TEIN Flex Z uses a full-length ride height adjustment system.
Ride height can therefore be changed primarily through the shock absorber body length rather than relying solely on spring preload.
This helps retain appropriate damper stroke while allowing the owner to achieve the desired ride height.
Depending on vehicle specification and setup, TEIN recommends approximately:
Front: around 25–30 mm lower
Rear: around 20–30 mm lower
Further adjustment is available within TEIN’s specified operating range.
Twin-Tube Damper Construction
TEIN Flex Z coilovers use a twin-tube shock absorber design.
TEIN developed this construction with street performance and ride quality in mind. The twin-tube arrangement helps provide sufficient suspension stroke and smooth damper operation, allowing the suspension to respond progressively over uneven road surfaces.
This makes the Flex Z especially attractive for UK GR Yaris owners who want a performance suspension upgrade without turning the car into an excessively harsh road car.
Improved GR Yaris Cornering Performance
The Toyota GR Yaris already offers exceptional chassis performance, but upgraded suspension allows the chassis to be tuned further.
TEIN specifically states that its Flex Z setup for the GR Yaris is designed to improve sports driving performance by reducing body roll and optimising damping force settings.
Potential benefits include:
- Reduced body roll during cornering
- More responsive steering behaviour
- Improved chassis control
- Reduced unwanted suspension movement
- Adjustable ride height
- Adjustable damping
- Improved road-holding feel
- More aggressive lowered appearance
- Greater ability to tune the vehicle for road or track use
Front Camber Adjustment
The GR Yaris-specific Flex Z kit uses a camber-adjustable front lower bracket.
TEIN supplies different adjustment collars with the system, increasing the available camber adjustment range.
This additional adjustment can be particularly useful when setting up a GR Yaris for:
- Fast-road driving
- Performance alignment
- Track days
- Wider performance tyres
- Different wheel and tyre combinations
- Increased front-end grip
Professional four-wheel alignment is strongly recommended after installation.
Spring Rates
TEIN lists the following spring rates for this application:
Front: 6.0 kgf/mm
Rear: 7.0 kgf/mm
These rates are matched to TEIN’s GR Yaris-specific damping calibration to provide an appropriate balance between handling response and road usability.
EDFC Compatible
The TEIN Flex Z range is compatible with TEIN’s optional EDFC electronic damping control system where the vehicle application allows.
EDFC replaces the manual damping adjustment mechanism with electronic motors, allowing damping settings to be adjusted from inside the vehicle.
Depending on the EDFC system used, additional levels of damping adjustment and automatic damping control may also be available.
EDFC components are sold separately unless specifically stated otherwise.
Why Upgrade Your Toyota GR Yaris with TEIN Flex Z?
The GR Yaris was developed with motorsport-inspired engineering, but suspension requirements vary considerably between drivers.
The TEIN Flex Z gives owners much greater control over how the chassis behaves.
For a road-focused vehicle, the suspension can be configured for a moderate drop and relatively compliant damping.
For spirited driving, the damping can be increased to provide greater body control.
For track-day use, ride height, damping and wheel alignment can be optimised around tyre choice and driving requirements.
That flexibility is one of the major advantages of choosing a fully adjustable GR Yaris coilover kit rather than fixed lowering springs.
Key Features
- Genuine TEIN Flex Z Coilover Kit
- Designed for Toyota GR Yaris GXPA16 / XPA1G
- Suitable for 1.6L turbo AWD models
- Full-length ride height adjustment
- 16-stage damping force adjustment
- Twin-tube damper construction
- Vehicle-specific spring and damping settings
- Front camber-adjustable lower bracket
- Adjustment collars supplied
- Reduced body roll
- Improved chassis control
- Adjustable lowered stance
- Suitable for fast-road driving
- Suitable for performance builds
- Suitable for occasional track use
- EDFC compatible where applicable
- Complete vehicle suspension kit
- TEIN quality and engineering
- SKU VSTN0-C1AA3
Vehicle Fitment
Make: Toyota
Model: GR Yaris
Chassis: GXPA16 / XPA1G
Engine: 1.6L G16E-GTS Turbo
Drivetrain: AWD / 4WD
Body: 3-Door Hatchback
Production Fitment: 2020 – March 2024
TEIN Part Number: VSTN0-C1AA3
Important 2024 Fitment Note
VSTN0-C1AA3 is intended for the original-generation GR Yaris through March 2024.
Toyota GR Yaris models produced from April 2024 onwards use a different TEIN Flex Z application, VSBLV-C1AA3.
Please confirm the vehicle production date before ordering if your GR Yaris was registered during 2024.
What’s Included?
The TEIN Flex Z kit is supplied as a complete suspension set for the vehicle and includes:
- Front coilover assemblies
- Rear dampers
- Rear springs
- Vehicle-specific mounting components
- Ride-height adjustment hardware
- Adjustment tools/components supplied by TEIN
Kit contents may vary slightly according to production specification.
Installation Recommendation
Professional installation is strongly recommended.
After fitting adjustable coilovers, the vehicle should receive a full four-wheel geometry alignment.
Correct alignment is particularly important on the GR Yaris because ride height and front camber changes can significantly affect tyre wear, steering response and handling characteristics.
Why Buy TEIN GR Yaris Coilovers from Performance Cars Parts UK?
Order your TEIN Flex Z Toyota GR Yaris Coilover Kit VSTN0-C1AA3 from Performance Cars Parts UK for premium Japanese performance suspension and tuning components for enthusiast and performance vehicles.
We supply performance parts for Toyota GR models and a wide range of Japanese, European and performance vehicles throughout the UK.
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