TEIN FLEX Z Adjustable Coilovers for 2015-2021 Subaru WRX / STI - VSSB2-C1SA4-C

TEIN | FLEX Z | Coilovers | 2015-2021 | Subaru | WRX | WRX STI | AWD | Lowering | 16-Way Damping | Height Adjustable | Front Camber Adjustment | 8K Front | 7K Rear | EDFC Compatible

Key Features & Specifications:

• Brand: TEIN

• Series: FLEX Z

• Product Type: Adjustable Coilover Suspension Kit

• Fitment: Vehicle-Specific

• Year Range: 2015-2021

• Make: Subaru

• Models: WRX / WRX STI

• Chassis: VAG / VAF

• Engine Applications: WRX 2.0L / WRX STI 2.5L

• Drivetrain: All-Wheel Drive (AWD)

• Damping Adjustment: 16 Levels, Front & Rear

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

• Damper Design: Twin-Tube

• Front Upper Mounts: Camber Adjustable

• Rear Upper Mounts: Reinforced Rubber

• Front Spring Rate: 8 kg/mm (448 lbs/in)

• Rear Spring Rate: 7 kg/mm (392 lbs/in)

• Front Recommended Ride Height: -1.2in

• Rear Recommended Ride Height: -1.0in

• Front Recommended Adjustment Range: -1.6in to -0.8in

• Rear Recommended Adjustment Range: -1.4in to -0.6in

• Front Maximum Adjustment Range: WRX -3.0in to -0.2in / STI -3.2in to -0.2in

• Rear Maximum Adjustment Range: -3.3in to +0.4in

• Front Spring Length: 175mm

• Rear Spring Length: 175mm

• Spring Inside Diameter: 70mm

• Front Spring Part Number: SW080-13175S-C

• Rear Spring Part Number: SW070-13175-C

• EDFC Compatibility: Yes, with separately purchased compatible components

• Quantity: 1 Front and Rear Coilover Kit

• Part Number: VSSB2-C1SA4-C

Fitment:

• 2015-2021 Subaru WRX 2.0L AWD

• 2015-2021 Subaru WRX STI 2.5L AWD

About TEIN FLEX Z Coilovers

TEIN FLEX Z coilovers are designed for drivers who want adjustable ride height, tunable suspension damping, and improved control over their vehicle's suspension setup. The FLEX Z series combines a twin-tube damper design with 16-level damping adjustment and full-length ride-height adjustment, making it suitable for daily driving, spirited street use, and performance-oriented suspension upgrades.

The full-length adjustment system allows ride height to be changed through the shock absorber body rather than relying solely on spring preload. This provides greater flexibility when setting vehicle stance while helping preserve usable damper travel. Adjustable damping lets drivers fine-tune suspension response to suit road conditions and driving preferences.

Part VSSB2-C1SA4-C is designed for 2015-2021 Subaru WRX and WRX STI models. The kit uses 8 kg/mm front springs and 7 kg/mm rear springs, with front camber-adjustable upper mounts and reinforced rubber rear upper mounts.

TEIN's recommended ride-height settings lower the vehicle approximately 1.2 inches in front and 1.0 inch in the rear. Additional adjustment is available within the specified ranges, which vary slightly between WRX and STI models at the front.

This FLEX Z kit is also compatible with TEIN's EDFC electronic damping control system when paired with the appropriate separately purchased components.

Installation & Compatibility Notes:

• EDFC installation requires cutting or removing portions of the rear interior trim to avoid interference.

• TEIN lists EDFC motor kit EDK05-12140 and extension kit EDK06-K4474 for this application.

• Ride-height settings and available adjustment ranges are based on TEIN's application specifications and may vary with vehicle condition and equipment.

• Professional installation and a four-wheel alignment are recommended after suspension installation or adjustment.