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TEIN FLEX Z Coilovers for Nissan Fuga KY51, Y51 / Nissan Fuga Hybrid HY51 / Infiniti M37 KY51 / Infiniti Q70 KY51 / Infiniti Q70L Y51 (market-specific imports) – VSK14-C1SA3

£1,008.00 Incl. VAT£840.00 Excl. VAT

Japanese-market / Chinese-market / US-market applications only. Match the original vehicle market, chassis, engine, trim and build dates shown below. UK registration alone does not establish compatibility with UK-market versions.

TEIN FLEX Z VSK14-C1SA3 for Nissan Fuga KY51, Y51 / Nissan Fuga Hybrid HY51 / Infiniti M37 KY51 / Infiniti Q70 KY51 / Infiniti Q70L Y51. 16-level damping adjustment. Check the detailed application and ride-height table below.

Supplied to order. Contact GSM Performance for availability and lead time.

Available on back-order

SKU: VSK14-C1SA3 Categories: Suspension, TEIN, TEIN FLEX Z Coilovers

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TEIN FLEX Z combines twin-tube dampers with 16-level adjustment of compression and rebound together. This VSK14-C1SA3 kit is listed for the specific applications below. Match your chassis, engine and model year before ordering.

Vehicle market: Japanese-market / Chinese-market / US-market applications only. Match the original vehicle market, chassis, engine, trim and build dates shown below. UK registration alone does not establish compatibility with UK-market versions.

Vehicle applications and ride-height settings

Height changes are relative to original equipment ride height: negative values mean lowering and positive values mean raising. Use the recommended range for your exact vehicle. The maximum adjustment range describes mechanical travel and is not a recommended operating setting. Actual height varies with vehicle condition and equipment.

Nissan FUGA KY51 2009.11-2015.01 — Japanese-market

Original vehicle market: Japanese-market
Engine displacement: 3700 cc
Drive: Rear-wheel drive
Grade / application: 370GT, 370GT TYPE S, 370VIP
Recommended front height change: -55 to -35 mm
Recommended rear height change: -50 to -30 mm
Maximum front adjustable range: -125 to -2 mm
Maximum rear adjustable range: -143 to -14 mm
TEIN reference setting: -45 mm front; -40 mm rear
Spring rates: 12 kgf/mm front; 5 kgf/mm rear
Upper mounts: Front: Rubber upper mount; rear: Rubber upper mount

Fitting requirements for this application: Rear: TEIN recommends EDFC because the rear seats must be removed for manual damping adjustment.

Nissan FUGA Y51 2009.11-2015.01 — Japanese-market

Original vehicle market: Japanese-market
Engine displacement: 2500 cc
Drive: Rear-wheel drive
Grade / application: 250GT, 250GT A PACKAGE, 250GT TYPE P, 250VIP
Recommended front height change: -50 to -30 mm
Recommended rear height change: -45 to -25 mm
Maximum front adjustable range: -120 to +3 mm
Maximum rear adjustable range: -138 to -9 mm
TEIN reference setting: -40 mm front; -35 mm rear
Spring rates: 12 kgf/mm front; 5 kgf/mm rear
Upper mounts: Front: Rubber upper mount; rear: Rubber upper mount

Fitting requirements for this application: Rear: TEIN recommends EDFC because the rear seats must be removed for manual damping adjustment.

Nissan FUGA HYBRID HY51 2015.02-2022.08 — Japanese-market

Original vehicle market: Japanese-market
Engine displacement: 3500 cc
Drive: Rear-wheel drive
Grade / application: BASE MODEL, A PACKAGE, VIP
Recommended front height change: -30 to -10 mm
Recommended rear height change: -35 to -15 mm
Maximum front adjustable range: -105 to +5 mm
Maximum rear adjustable range: -143 to -13 mm
TEIN reference setting: -20 mm front; -25 mm rear
Spring rates: 12 kgf/mm front; 5 kgf/mm rear
Upper mounts: Front: Rubber upper mount; rear: Rubber upper mount

Fitting requirements for this application: Rear: remove the rear seats to access the damping adjustment.

Infiniti M37 KY51 2010-2013 — Chinese-market

Original vehicle market: Chinese-market
Engine displacement: 3700 cc
Drive: Rear-wheel drive
Grade / application: See chassis, engine and years above
Recommended front height change: -55 to -35 mm
Recommended rear height change: -50 to -30 mm
Maximum front adjustable range: -125 to -2 mm
Maximum rear adjustable range: -143 to -14 mm
TEIN reference setting: -45 mm front; -40 mm rear
Spring rates: 12 kgf/mm front; 5 kgf/mm rear
Upper mounts: Front: Rubber upper mount; rear: Rubber upper mount

Fitting requirements for this application: Rear: TEIN recommends EDFC because the rear seats must be removed for manual damping adjustment.

Infiniti M37 KY51 2011-2013 — US-market

Original vehicle market: US-market
Engine displacement: 3700 cc
Drive: Rear-wheel drive
Grade / application: V6
Recommended front height change: -55 to -35 mm
Recommended rear height change: -50 to -30 mm
Maximum front adjustable range: -125 to -2 mm
Maximum rear adjustable range: -143 to -14 mm
TEIN reference setting: -45 mm front; -40 mm rear
Spring rates: 12 kgf/mm front; 5 kgf/mm rear
Upper mounts: Front: Rubber upper mount; rear: Rubber upper mount

Fitting requirements for this application: Rear: TEIN recommends EDFC because the rear seats must be removed for manual damping adjustment.

Infiniti Q70 KY51 2014-2019 — US-market

Original vehicle market: US-market
Engine displacement: 3700 cc
Drive: Rear-wheel drive
Grade / application: V6
Recommended front height change: -55 to -35 mm
Recommended rear height change: -50 to -30 mm
Maximum front adjustable range: -125 to -2 mm
Maximum rear adjustable range: -143 to -14 mm
TEIN reference setting: -45 mm front; -40 mm rear
Spring rates: 12 kgf/mm front; 5 kgf/mm rear
Upper mounts: Front: Rubber upper mount; rear: Rubber upper mount

Fitting requirements for this application: Rear: TEIN recommends EDFC because the rear seats must be removed for manual damping adjustment.

Infiniti Q70L Y51 2013+ — Chinese-market

Original vehicle market: Chinese-market
Engine displacement: 2500 cc
Drive: Rear-wheel drive
Grade / application: See chassis, engine and years above
Recommended front height change: -50 to -30 mm
Recommended rear height change: -45 to -25 mm
Maximum front adjustable range: -120 to +3 mm
Maximum rear adjustable range: -138 to -9 mm
TEIN reference setting: -40 mm front; -35 mm rear
Spring rates: 12 kgf/mm front; 5 kgf/mm rear
Upper mounts: Front: Rubber upper mount; rear: Rubber upper mount

Fitting requirements for this application: Rear: TEIN recommends EDFC because the rear seats must be removed for manual damping adjustment.

Installation and ordering

Use a suspension specialist for installation and wheel alignment. Follow the supplied instructions and check tyre, body and suspension clearance throughout steering and suspension travel. Optional EDFC electronics are sold separately.

Supplied to order. Contact GSM Performance for current availability and lead time before booking installation.

Product photograph

This is a representative TEIN FLEX Z range photograph. The pictured mounting hardware and layout may differ from this vehicle-specific kit. Select by part number and the application specification, not the photograph.

Application data: TEIN UK catalogue for VSK14-C1SA3.

Additional information

Brand	TEIN
Vehicle Manufacturer	Infiniti, Nissan
Vehicle Model	FUGA HYBRID HY51, FUGA KY51, FUGA Y51, M37 KY51, Q70 KY51, Q70L Y51
Series	FLEX Z
Damper Type	16-level damping adjustable twin-tube
Top Mount Type	Front: Rubber upper mount; rear: Rubber upper mount
Ride Height Adjustment	HY51 2015.02-2022.08: Recommended: front -30 to -10 mm; rear -35 to -15 mm, KY51 2009.11-2015.01: Recommended: front -55 to -35 mm; rear -50 to -30 mm, KY51 2010-2013: Recommended: front -55 to -35 mm; rear -50 to -30 mm, KY51 2011-2013: Recommended: front -55 to -35 mm; rear -50 to -30 mm, KY51 2014-2019: Recommended: front -55 to -35 mm; rear -50 to -30 mm, Y51 2009.11-2015.01: Recommended: front -50 to -30 mm; rear -45 to -25 mm, Y51 2013+: Recommended: front -50 to -30 mm; rear -45 to -25 mm
Spring Rate	12 kgf/mm front; 5 kgf/mm rear
Kit Configuration	Coilover suspension kit
Fitting Position	Front and Rear

Will this fit my car?
This listing is for the Infiniti FUGA HYBRID HY51, FUGA KY51, FUGA Y51 and the other models listed. Chassis code, model year, engine and drivetrain all matter, and TEIN often use different part numbers for cars that look the same, so check your car against the vehicle table in the description. If anything is unclear, send us your registration or VIN and we will check it before you order.

What can I adjust?
The TEIN FLEX Z uses twin-tube dampers with 16-level adjustable damping, and the ride height is adjustable.

What comes in the kit?
Coilovers front and rear. It has rubber upper mounts front and rear. Spring rates are 12 kgf/mm front and 5 kgf/mm rear.

How low will it go?
TEIN publish a recommended height range for each application, worked out in their own testing, and a wider maximum range that is not a recommended setting. The recommended range for each version of the car is in the vehicle table in the description. Our guide Ride Height, Preload And Getting A Coilover Setup Right explains how to set it without running out of travel.

Is it right for road or track?
It depends how much of your driving is on track. Our guide Fast Road Or Track: Choosing The Damping On A Set Of Coilovers explains what 1-way, 2-way and 3-way adjustment gets you.

Can I fit it myself?
Our guide Fitting Coilovers At Home Or Having Them Done covers what the job involves. Either way, have the wheel alignment checked after fitting and check wheel and tyre clearance through full steering lock and suspension travel.

Can they be rebuilt?
TEIN run a replacement service for FLEX Z dampers rather than an overhaul, so a worn damper is swapped for a new unit. Ask us if you need one.

How long does it take?
This kit is ordered in from the supplier for your car. Ask us for the current lead time before you book the fitting.

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