AST Coilovers for Ford Fiesta ST (JD3 / JH1)

Coilovers for the Fiesta ST on the JD3 and JH1 chassis, listed by AST from 2001 to 2014. Four series are offered: the 5100 Street TCO, the 5100 Clubracing with top mounts front and rear, and the 5200 2-Way and 5300 3-Way with external reservoirs. Every one adjusts for ride height and rebound damping.

• Four series: 5100 Street TCO, Clubracing, 5200 2-Way and 5300 3-Way
• Fiesta ST, JD3 and JH1 chassis
• Coilovers front and rear, with a 12-position rebound adjuster
• 5200 and 5300: separate compression adjustment and external reservoirs

Choose your series

Every AST damper is a monotube: nothing inside can aerate or foam, which AST say keeps the valving responsive.

5100 Street TCO, coilovers front and rear (AST ACU)

The 5100 Street kit in TCO form: inverted monotube coilovers at the front and the rear, adjustable for rebound damping and ride height. Springs come in the kit, which works with the car's original top mounts. The rebound adjuster has 12 positions, and the dampers can be rebuilt.

AST part number: ACU-F1009S

5100 Clubracing (AST ACC)

The 1-way kit for cars that see track days as well as daily miles: inverted monotube coilovers front and rear, with top mounts at both ends. The front top mounts adjust for camber; the rear ones are solid. Spring rates can be changed to suit. Ride height adjusts, the rebound adjuster has 12 positions, and the dampers can be rebuilt.

AST part number: ACC-F1009S

5200 2-Way Motorsport (AST RIV)

Rebound and compression damping each have their own adjuster, and ride height adjusts too. Compression damping sets how quickly the suspension moves in; rebound sets how quickly it extends again. The dampers work with external reservoirs, mounted remotely. The struts are inverted, which AST use because that design copes with heavy sideways loads and with braking. Where the car needs them, camber-adjustable front and solid rear top mounts are included. Spring rates can be changed, and the rebound adjuster has 12 positions. AST made it first of all for track driving.

AST part number: RIV-F1006S

5300 3-Way Motorsport (AST RAC)

Three separate damping adjusters - rebound, low-speed compression and high-speed compression - plus adjustable ride height. Low-speed compression looks after slow, gradual movement of the suspension; high-speed compression looks after sharp, hard hits. The dampers work with external reservoirs, mounted remotely. The struts are inverted, which AST use because that design copes with heavy sideways loads and with braking. Where the car needs them, camber-adjustable front and solid rear top mounts are included. Spring rates can be changed, and the rebound adjuster has 12 positions. AST's kit for the most committed circuit drivers.

AST part number: RAC-F1006S

The photos are AST's own sample shots of each series, not of the kit for your car, which is made for its suspension and differs in detail.

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