Tein VSHF6-CUAA1-C Flex Z Coilovers 2014-2022 Honda Civic Si/Acura ILX

Vehicle Fitment

• 2014-2015 Honda Civic Si Sedan (FB6, FWD, 2.4L I4 K24Z7)
• 2014-2015 Honda Civic Si Coupe (FG4, FWD, 2.4L I4 K24Z7)
• 2016-2022 Acura ILX - All Trims (DE2, FWD, 2.4L I4 K24W7)

Fitment Notes

• Dedicated kit for 2014-2015 Civic Si (FB6/FG4) and 2016-2022 Acura ILX (DE2) - installs directly with no additional conversion parts or brackets required
• Rear upper mounts reuse OE factory mounts - rear upper mounts not included in this kit
• Rear OE spring insulator must be modified during installation
• EDFC compatible - requires EDFC Motor Kit EDK05-10140 and Front Strut Extension Kit EDK06-K4474 (both sold separately)
• FWD only

Features

• Full-length ride height adjustment maintains shock travel and ride quality at all lowered positions
• 16-way damping force adjustment (compression and rebound together) via top-mounted click adjuster
• Front camber-adjustable pillowball upper mounts included for precise alignment correction at lowered ride heights
• Spring rates tuned specifically for the K24-powered 9th-gen Civic Si and ILX platform's suspension geometry
• Twin-tube damper construction delivers a smooth, composed ride suited to Si and ILX daily and sport driving
• EDFC compatible for optional in-cabin electronic damping adjustment (sold separately)
• ZT-coated threaded sleeve and TEIN-green powder-coated springs and brackets for long-term corrosion resistance

Specifications

• Front Spring Rate: 392 lbs/in (7.0 kgf/mm)
• Rear Spring Rate: 448 lbs/in (8.0 kgf/mm)
• Front Ride Height Adjustment Range: -0.2 to -3.0 in (-6mm to -76mm)
• Front Spring Free Length: 175mm | Spring ID: 70mm
• Damping Adjustment: 16-Way (Compression and Rebound Together)
• Front Upper Mount: Camber-Adjustable Pillowball (included)
• Rear Upper Mount: OE Reuse (Rear upper mounts not included)
• EDFC Compatible: Yes (requires EDK05-10140 + EDK06-K4474, sold separately)
• Chassis Codes: FB6 / FG4 / DE2
• Drivetrain: FWD
• Engines: 2.4L I4 K24Z7 (Civic Si) / 2.4L I4 K24W7 (ILX)

Included Components

• 4x Coilover Damper Assemblies (2x Front, 2x Rear)
• 4x Main Springs
• 4x Bump Rubbers
• 4x Spring Seats
• 4x Seat Locks
• 2x Front Camber-Adjustable Pillowball Upper Mounts
• 2x Hook Spanners
• 1x Instruction Manual
• Note: Rear upper mounts not included - reuse OE factory mounts

Product Description

The Tein VSHF6-CUAA1-C Flex Z is a dedicated coilover kit for the 2014-2015 Honda Civic Si Sedan and Coupe (FB6/FG4) and the 2016-2022 Acura ILX (DE2) - the K24-powered 9th-generation Si platform and its Acura ILX successor. Unlike broader 9th-gen Civic Flex Z kits that require additional adapter hardware for Si fitment, this kit bolts directly to the FB6/FG4 and DE2 without any conversion parts. With 392 lbs/in front and 448 lbs/in rear spring rates and front camber-adjustable pillowball upper mounts, the Flex Z delivers meaningful stance improvement and handling sharpness tuned to the Si/ILX platform's sportier character.

Built in Yokohama, Japan with twin-tube construction and Tein's sealed damper structure, this kit requires reuse of the OE rear upper mounts (not included) and modification of the OE rear spring insulator during installation. EDFC installation requires Motor Kit EDK05-10140 and Front Strut Extension Kit EDK06-K4474, both sold separately. Professional installation and wheel alignment are recommended after fitment.