A coilover is only as good as its damper, and AST starts with a real monotube built to motorsport tolerances, then tunes it to the car. The result is control you can feel on a rough back road as much as on a track day, with the adjustability to move between the two.

AST and Moton are engineered under the same roof in the Netherlands - Moton for professional motorsport, AST for the street-and-track driver - which is why AST valving tends to feel composed at speed rather than simply stiff. The 5300 series separates compression and rebound adjustment so the two can be tuned independently.

AST Suspension builds dampers and coilover systems in the Netherlands for drivers who want their car to work harder on track without giving up the road. From the single-adjustable 5100 series to the 5300 series with independent compression and rebound, every AST kit is built around a motorsport-grade monotube damper and tuned to the specific chassis.

AST shares engineering with Moton, its motorsport sister brand, and that heritage shows in the details: threaded bodies, quality top mounts, and valving developed on real cars rather than borrowed from a catalog.