TEIN VSY66-C1SA3-C Flex Z Coilovers 16-Way for 01-06 Lexus LS430/Celsior UCF30

Vehicle Fitment

• 2001-2006 Lexus LS430 (UCF30, 4.3L V8, RWD)
• 2000-2006 Toyota Celsior (UCF30, 4.3L V8, RWD -- JDM)

Fitment Notes

• RWD only -- does not fit AWD variants
• Does not fit vehicles with OEM electronic damping control -- aftermarket coilovers are not compatible with factory EDC
• EDFC Active / Active Pro compatible -- TEIN EDK05-12120 required (sold separately)
• Complete front and rear kit -- sold as a set of 4
• Wheel alignment required after installation
• Professional installation recommended

Features

• TEIN Flex Z -- twin-tube oil and gas coilover system
• 16-stage damping adjustment -- compression and rebound together
• Full-length ride height adjustment -- ride quality maintained at any height setting
• Separate spring preload and ride height adjustment
• Reinforced rubber upper mounts -- street NVH compliance
• ZTP Coating -- 2-layer, 1-bake anti-rust powder coat (Japanese patent 4347712)
• New oil formulation -- stable damping across all temperatures
• Test fitted and road tested in Japan by TEIN engineers
• EDFC Active / Active Pro compatible
• Made in Japan
• 1-year limited warranty

Specifications

• Series: Flex Z
• Damper type: Twin-tube (oil and gas)
• Damping adjustment: 16 stages
• Upper mount: Reinforced rubber
• Front spring rate: 14 kg/mm (784 lb/in)
• Rear spring rate: 8 kg/mm (448 lb/in)
• Front drop (recommended): 35-55mm (1.4"-2.2")
• Front max adjustment range: +5mm to -113mm
• Rear drop (recommended): 30-50mm (1.2"-2.0")
• Rear max adjustment range: +44mm to -119mm
• EDFC compatible: Yes (EDK05-12120, sold separately)
• Quantity: Set of 4 (complete kit)
• Warranty: 1 year limited

Included Components

• 2x TEIN Flex Z front coilover assemblies with springs and reinforced rubber upper mounts
• 2x TEIN Flex Z rear coilover assemblies with springs and reinforced rubber upper mounts
• Hardware kit and installation manual

Product Description

The TEIN VSY66-C1SA3-C is a Flex Z coilover kit for the 2001-2006 Lexus LS430 (UCF30) and Toyota Celsior UCF30, RWD. Flex Z is TEIN's redesigned production-line coilover -- engineered from the ground up to achieve near-double-the-price performance at an accessible price point through a completely rebuilt manufacturing process at TEIN's Yokohama facility. The twin-tube oil and gas damper design produces longer strokes at lower repulsive force than a mono-tube, making the Flex Z more compliant on rough surfaces than its spring rates would suggest and well-suited to the LS430's grand touring character.

The full-length ride height adjustment system separates spring preload from ride height setting, meaning the damper maintains full travel regardless of how much the car is lowered -- avoiding the suspension travel loss inherent to many budget coilover systems. 16-stage click damping adjustment controls both compression and rebound simultaneously. Reinforced rubber upper mounts retain factory-level NVH compliance. Compatible with TEIN's EDFC Active electronic damping control module (EDK05-12120, sold separately), which allows damping adjustment from inside the cabin. Does not retain factory EDC. ZTP anti-rust powder coating is applied using TEIN's patented 2-layer, 1-bake process. Made in Japan. 1-year limited warranty.