TEIN FLEX Z Adjustable Coilovers for 1990-1999 Toyota MR2 SW20 / SW21 - VST04-C1SA4-C

TEIN | FLEX Z | Coilovers | 1990-1999 Toyota MR2 | SW20 | SW21 | 2.0L | 2.2L | Mid-Engine | RWD | 16-Way Damping | Full-Length Height Adjustment | Front Camber Adjustment | 4K Front | 8K Rear | EDFC Compatible

The TEIN FLEX Z coilover kit, part number VST04-C1SA4-C, is designed for the 1990-1999 Toyota MR2 with the 2.0L or 2.2L engine and mid-engine, rear-wheel-drive layout. Featuring 16-level damping adjustment, full-length ride-height adjustment, and front camber-adjustable upper mounts, this kit offers control over suspension height, damper firmness, and front camber settings. Its 4K front and 8K rear springs are paired with TEIN's twin-tube dampers, while reinforced rubber rear upper mounts complete the suspension setup.

Key Features & Specifications:

• Brand: TEIN

• Series: FLEX Z

• Product Type: Adjustable Coilover Suspension Kit

• Part Number: VST04-C1SA4-C

• Vehicle: Toyota MR2

• Fitment Years: 1990-1999, per supplied application catalog

• Generation: Second Generation / SW20-SW21

• Engine Applications: 2.0L and 2.2L 4-Cylinder

• Drivetrain Layout: Mid-Engine, Rear-Wheel Drive (RWD)

• Body Style: 2-Door

• Damping Adjustment: 16 Levels, Front and Rear

• Ride Height Adjustment: Full-Length Adjustable, Front and Rear

• Damper Design: Twin-Tube

• Front Upper Mounts: Camber Adjustable

• Rear Upper Mounts: Reinforced Rubber (R/U)

• Front Spring Rate: 4 kgf/mm (224 lbs/in)

• Rear Spring Rate: 8 kgf/mm (448 lbs/in)

• Front Spring Free Length: 175mm

• Rear Spring Free Length: 200mm

• Front Spring Inside Diameter: 65mm

• Rear Spring Inside Diameter: 70mm

• Front Spring Part Number: SQ040-13175S-C

• Rear Spring Part Number: SB080-13200-C

• Recommended Front Lowering: 1.6in (40mm)

• Recommended Rear Lowering: 1.8in (45mm)

• EDFC Compatibility: Yes, with separately purchased components

• EDFC Motor Kit: EDK05-12140

• EDFC Front Extension Kit: EDK06-K4474

• Kit Coverage: Front and Rear Suspension

Fitment:

• 1990-1999 Toyota MR2 2.0L RWD (SW20L)

• 1990-1999 Toyota MR2 2.2L RWD (SW21L)

Fitment Notes:

• Designed for the second-generation Toyota MR2 applications listed above.

• The supplied catalog lists both the SW20L 2.0L and SW21L 2.2L configurations.

• Fitment for earlier AW11 or later MR2 Spyder ZZW30 models is not established for this part number.

• Confirm model year, chassis and factory suspension configuration before ordering.

About TEIN FLEX Z Coilovers

The TEIN FLEX Z is a suspension option for MR2 owners who want more adjustment than a simple lowering kit provides. It allows you to change ride height and damping firmness separately, making it easier to set the car up around your preferred stance and driving conditions.

Each twin-tube damper provides 16 levels of damping adjustment. That means you can run a softer setting for everyday driving or increase damping firmness when you want a different suspension response, without changing the springs.

The full-length adjustable design also gives you more control over ride height. By adjusting the damper assembly length independently from spring preload, you can change the vehicle's stance while helping maintain usable suspension travel.

Designed for the Second-Generation Toyota MR2

Part VST04-C1SA4-C is listed for both the 2.0L SW20L and 2.2L SW21L MR2 configurations.

The kit uses 4 kgf/mm front springs and 8 kgf/mm rear springs, with different spring lengths and inside diameters for each end. Front camber-adjustable upper mounts offer additional alignment flexibility, while reinforced rubber rear mounts provide a less rigid mounting arrangement than pillowball mounts.

TEIN specifies the same recommended lowering measurements for both applications: approximately 1.6 inches in front and 1.8 inches in the rear.

For an older MR2 with worn suspension components, FLEX Z can provide a complete coilover replacement with adjustable height and damping, rather than relying on lowering springs alone.

Recommended Ride Height

Recommended Ride Height Adjustment Range

Maximum Ride Height Adjustment Range

All ride-height measurements are relative to factory suspension height. Maximum adjustment limits are not recommended everyday driving settings. Actual lowering depends on vehicle condition, suspension travel, equipment, and wheel and tire clearance.

Spring Specifications

EDFC Compatibility & Installation Notes

This FLEX Z kit is compatible with TEIN's optional Electronic Damping Force Controller (EDFC) system when paired with the specified separately purchased components.

• EDFC Motor Kit: EDK05-12140

• EDFC Front Extension Kit: EDK06-K4474

• Rear Motor Orientation: The rear EDFC motor must be installed parallel to the engine-side cover, according to TEIN's fitting instructions.

• Radiator Reservoir Hose: The left radiator reservoir hose must be relocated to provide clearance during EDFC installation.

• Front Camber Adjustment: Camber-adjustable upper mounts provide additional front alignment adjustment.

• Rear Upper Mounts: Reinforced rubber mounting design.

• Ride Height: Full-length adjustable at both ends; follow TEIN's specified damper-length and spring-preload procedures.

• Installation: Professional suspension installation and a complete four-wheel alignment are recommended after fitting or adjusting the coilovers.

EDFC motors, controllers, and extension components are optional accessories and are not included with the standard FLEX Z kit. The rear motor positioning and hose relocation requirements apply to the optional electronic damping installation.

For second-generation MR2 owners who want adjustable lowering, damping control, and front camber adjustment, TEIN FLEX Z provides a vehicle-specific suspension setup for both listed 2.0L and 2.2L configurations.