The 4100 Series shocks introduce high performance monotube technology at prices competitive with twin tube insert coilover kits. They include purpose built strut and shock bodies, shortened from stock lengths. All kits come with anodized aluminum adjusters that stay on the shock; no need to keep your pockets full of tools to make quick adjustments.
Monotube design - allows for the biggest piston sizes available
Floating piston design with high pressure nitrogen means no cavitation around the piston
Adjuster knobs permanently mounted on the dampers
New low friction seal on all AST dampers
Rubber bushings for eye shock mounts
Rebound Adjustable (Singles)
22mm diameter shaft struts, non-inverted
Steel cylinder body shocks, non-inverted
Optional DDP piston (double digressive)
Optional spherical upper shock mount assemblies
Optional DLC Coated shafts
Re-buildable

Monotube design coilovers street-use. 1 way adjustable in height and damping rebound adjustable ('Singles').