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AST4100 series coilovers 08+ WRX


Product Description

Benefits include:

  • Monotube design - gives 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 – no fumbling for knobs
  • Fully threaded strut bodies allow maximum tire width without fender rolling or larger spacers
  • Rebuildable by AST-USA – get the valving you want, when you want it.


AST-USA provides a 12 month warranty on the 4100 Series shocks and dampers. 

» Rebound Adjustable ("Singles")
» 22mm diameter shaft struts, non-inverted
» Steel cylinder body shocks, non-inverted
» Rubber bushings for "eye" shock mounts
» Optional spherical upper shock mount assemblies
» Non-synthetic hydraulic fluid


Price includes 4 helper springs with Hyperco main springs of custom spring rate of your choice. Swift main springs also vailable at aditional cost.

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