TEIN VSA02-C1SA1 Flex Z Coilover Kit for 2002-2006 Acura RSX

The TEIN Flex Z Coilover Kit represents an exceptional balance of street comfort and performance tuning capability. Engineered as an evolution of TEIN's renowned Street Flex system, the Flex Z delivers premium suspension technology at an accessible price point while maintaining the legendary "Made in Yokohama" quality that TEIN is known for.

Twin-Tube Design for Superior Street Performance:

The Flex Z utilizes a twin-tube shock absorber system specifically designed for street-driven vehicles with lowered ride heights and larger wheel packages. This design provides sufficient stroke length and low-friction operation, allowing the dampers to smoothly follow rough road surfaces. The result is supple ride quality at low speeds while maintaining stable, composed handling at higher speeds. The twin-tube configuration separates oil and gas chambers for optimal comfort without sacrificing performance.

Key Features:

• Full-length ride height adjustment system allows ride height changes without altering damper stroke or spring preload
• 16-way adjustable damping force lets you dial in your preferred ride characteristics
• Front spring rate: 8 kgf/mm (448 lbs/in), Rear spring rate: 10 kgf/mm (560 lbs/in)
• Adjustable camber upper mounts included for front suspension
• Compatible with TEIN EDFC (Electronic Damping Force Controller) for in-car damping adjustment
• Height adjustment range: Front -1.8 inches, Rear -1.8 inches
• Complete kit includes all four shock absorbers, springs, and upper mounts

Premium Construction and Durability:

TEIN's cold-formed SAE9254 high-tensile steel springs provide exceptional resistance to sagging with a minimum tensile strength of 200 kgf/mm². The springs feature a durable powder coating that resists chipping and peeling. Shell cases are constructed from high-strength STKM13C steel for rigidity and long-term reliability. TEIN's specially-formulated damper oil maintains stable viscosity across all temperature ranges and features superior anti-foaming properties for consistent performance. The proprietary ZTP coating on adjustment threads and two-layer powder coating system provide thoroughgoing rust protection, even in harsh climates.

Sealed Structure Design:

The Flex Z features TEIN's innovative sealed structure construction, where the shell pipe is drawn, filled with oil and gas, then completely sealed through a crimping process. While this sealed design makes the dampers non-rebuildable at home, it allows TEIN to offer this level of quality and performance at a remarkably competitive price point. TEIN still offers factory replacement service to restore used shock absorbers.

Manufactured in TEIN's Yokohama, Japan facility with precision engineering and quality control, the Flex Z Coilover Kit delivers race-proven technology refined for daily driving enjoyment.