Tein VSB90-C1SA3 Flex Z Coilovers for 08-12 Accord/09-14 TSX CS1/CS2/CU2/CU4/CP2

Vehicle Fitment

• 2009-2014 Acura TSX Sedan (CU2) - 2.4L 4-Cylinder - FWD
• 2010-2014 Acura TSX Sedan (CU4) - 3.5L V6 - FWD
• 2011-2014 Acura TSX Sport Wagon (CW2) - 2.4L 4-Cylinder - FWD
• 2008-2012 Honda Accord Sedan (CP2/CS1) - 2.4L 4-Cylinder - FWD
• 2008-2012 Honda Accord Sedan (CP3/CS2) - 3.5L V6 - FWD
• 2008-2012 Honda Accord Coupe (CS1) - 2.4L 4-Cylinder - FWD
• 2008-2012 Honda Accord Coupe (CS2) - 3.5L V6 - FWD

Fitment Notes

• Complete front and rear coilover kit (4 corners)
• FWD models only
• Does NOT fit Honda Accord Crosstour
• Does NOT fit 2013+ Honda Accord (9th generation)
• Upper mounts included for all four corners
• Pillow ball front upper mounts with camber adjustment
• Lowering range varies by model -- see Specifications
• Alignment required after installation
• Compatible with Tein EDFC / EDFC Active for in-car damping adjustment

Features

• Tein Flex Z full-length adjustable coilover system
• Twin-tube damper design for street comfort
• 16-level damping force adjustment (compression + rebound combined)
• Full-length ride height adjustment -- no loss of shock travel
• Sealed damper construction for consistent performance
• ZT Coating -- fluorine resin baked finish for rust prevention and low friction
• Wrought aluminum spring seats with low-friction thrust washers
• High-spec damper oil for stable performance across temperatures
• No-sag cold-wound springs
• Includes ride height adjusting wrench
• EDFC compatible for in-car electronic damping control
• Made in Yokohama, Japan

Specifications

• Series: Flex Z
• Damper type: Twin-tube, sealed
• Damping adjustment: 16 levels
• Spring rate front: 10 kgf/mm (560 lbs/in)
• Spring rate rear: 5 kgf/mm (280 lbs/in)
• Front spring: 225mm L / 70mm ID
• Rear spring: 250mm L / 70mm ID
• Lowering range (TSX): Front -0.1" to -3.3" / Rear +0.4" to -3.2"
• Lowering range (Accord 2.4): Front -0.4" to -3.3" / Rear -1.0" to -4.8"
• Ride height adjustment: Full-length (case length adjustment)
• Front upper mount: Pillow ball with camber adjustment
• Shell case finish: ZT Coating (fluorine resin)
• Country of origin: Japan
• Sold as a complete 4-corner kit

Included Components

• Front coilover assemblies with springs and upper mounts (2)
• Rear coilover assemblies with springs and upper mounts (2)
• Ride height adjusting wrench
• Installation hardware

Product Description

The Tein VSB90-C1SA3 Flex Z is a complete four-corner coilover kit designed for the 2008-2012 Honda Accord and 2009-2014 Acura TSX. The Flex Z line inherits the full feature set of Tein's proven Street Flex platform -- including full-length ride height adjustment and 16-level damping control -- while utilizing a sealed damper construction that significantly reduces manufacturing cost without compromising performance. The twin-tube damper design prioritizes street ride comfort, offering low-friction operation and sufficient stroke length to handle rough road surfaces at lowered ride heights. Full-length height adjustment changes the case length rather than spring preload, ensuring consistent ride quality across the entire lowering range. The 16-click damping adjustment allows tuning from soft daily-driver comfort to firmer sport settings, and the system is compatible with Tein's EDFC Active controller for in-car electronic damping adjustment. Spring rates are set at 10 kgf/mm front and 5 kgf/mm rear for balanced handling with a street-focused bias. Every Flex Z application is test-fitted and road-tested by Tein's suspension engineers at their Yokohama headquarters. The ZT Coating on all shell cases provides long-term corrosion resistance and maintains smooth adjustment over the life of the kit.