Dial-In Street Performance for Your Mazda MX-5 Miata
The Tein GSMD0-9USS2 Street Advance Z coilover kit gives Mazda MX-5 Miata owners a direct upgrade path from worn OE dampers to a fully height-adjustable, twin-tube coilover system. Built around Tein’s 16-way damping adjustment dial, the GSMD0-9USS2 lets you fine-tune compression and rebound to match daily commuting, weekend canyon runs, or light track days without swapping hardware. Every GSMD0-9USS2 kit ships with Tein’s No-Sag springs and TEIN-Green powder-coated shell cases, so the GSMD0-9USS2 holds its ride height and finish long after installation.
Key Features
- Twin-tube damper system for a longer stroke, smaller repulsive force, and high ride comfort
- 16-way damping force adjustment dial lets you dial in compression and rebound feel for street or spirited driving
- Ride height adjustable via the lower spring seat, independent of damping settings
- No-Sag Spring cold-formed from SAE9254 steel with a minimum tensile strength of 200 kgf/mm2
- TEIN-Green two-layer, one-bake powder coating (Japanese patent 4347712) for durable, solvent-free corrosion protection
- ZTP-coated ride-height adjustment threads resist abrasion and rust-seizure over time
- High-performance damper oil formulated for stable viscosity, anti-foaming, and cavitation resistance across temperature swings
- EDFC-compatible on applicable vehicles for optional remote damping control
Fitment Table
| Year Range | Make | Model | Trim |
|---|---|---|---|
| 2016-2019 | Mazda | MX-5 Miata | Club |
| 2016-2019 | Mazda | MX-5 Miata | Grand Touring |
| 2017-2019 | Mazda | MX-5 Miata | RF Club |
| 2017-2019 | Mazda | MX-5 Miata | RF Grand Touring |
| 2016-2019 | Mazda | MX-5 Miata | Sport |
Specifications
| Detail | Value |
|---|---|
| MPN | GSMD0-9USS2 |
| Series | Street Advance Z |
| Damper Type | Twin-tube, damping force adjustable (16-way) |
| Adjustability | Ride height (lower spring seat) and damping force |
| Spring Type | No-Sag cold-formed SAE9254 steel spring |
| Finish | TEIN-Green two-layer powder coating |
| EDFC Compatible | Yes, on applicable vehicles |
| Fitment | Mazda MX-5 Miata |
What’s Included
- 4 Tein Street Advance Z dampers with integrated 16-way damping adjustment dials
- 4 No-Sag springs, pre-fitted to the lower spring seats
- Ride height adjustment wrenches
- Damping force adjustment tool
- Installation instruction manual
About Tein
Tein has engineered coilovers and suspension components in Japan since 1985, and the Street Advance Z series carries that engineering into a daily-drivable, adjustable coilover built for street enthusiasts. Tein’s sealed damper construction and patented TEIN-Green coating are designed to keep kits like the GSMD0-9USS2 performing and looking new well past installation day.
FAQ
What is the GSMD0-9USS2?
The GSMD0-9USS2 is a Tein Street Advance Z coilover kit built for Mazda MX-5 Miata. It pairs a twin-tube, 16-way adjustable damper with a No-Sag spring and full ride-height adjustment for street use.
Does the kit include upper mounts?
No, the Street Advance Z series reuses the vehicle’s factory upper mounts, which are not included.
Can I adjust ride height after installation?
Yes, the GSMD0-9USS2 kit adjusts ride height via the lower spring seat independent of the damping settings.
Is the damping force adjustable?
Yes, the GSMD0-9USS2 includes a damping force adjustment dial so you can tune compression and rebound feel.
Is this kit EDFC compatible?
The Street Advance Z line is EDFC compatible on applicable vehicles, letting you add Tein’s electronic damping control accessory later. Confirm compatibility for your specific chassis before ordering EDFC parts.
Will this coilover kit pass a daily-driving comfort test?
Yes, the GSMD0-9USS2 uses a twin-tube damper design that Tein tunes for smooth low-speed comfort and stable high-speed control, making it a comfortable daily-driver-friendly coilover.
How is the spring finished?
Every GSMD0-9USS2 spring is cold-formed from SAE9254 steel and coated with a durable, peel-resistant powder finish.
What is the shell case coating?
The GSMD0-9USS2 shell cases use Tein’s patented TEIN-Green two-layer, one-bake powder coating for corrosion resistance.
Install Instructions
- Raise and safely support the vehicle, then remove the wheel on the corner being serviced
- Disconnect the factory shock or strut assembly and remove it, retaining the OE upper mount
- Set the GSMD0-9USS2 damper to your target ride height using the lower spring seat before installation
- Attach the OE upper mount to the GSMD0-9USS2 damper shaft and torque to factory specification
- Install the assembled GSMD0-9USS2 coilover into the vehicle and torque all mounting hardware to spec
- Reinstall the wheel, lower the vehicle, and set the damping dial to your preferred setting
- Have an alignment performed before extended driving
