AST 4150 Coilovers - For BMW E90 E92 Non-M, Non-Coilover Rear

AST 4150 Coilovers - For BMW E90 E92 Non-M, Non-Coilover Rear

  • $999.00
  • Save $1,000

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Last one left (one sold)

Brand New - Springs INCLUDED (Standard spring rates 8kg F, 8.5kg R)

PN: A 505 003 (For both E90 E92 Non-M)


The 4100 Series shock absorbers utilise high performance monotube technology:

  • Monotube design shocks absorbers gives your car a better performance than the standard twin tube design, the gas pressure is separated by a floating piston and eliminates cavitation and airation within the oil chamber.
  • The 4100 series shocks allow rebound adjustment with one knob.
  • The adjust platform allows the use to adjust the ride height of your car.
  • AST suspension shock bodies are specially designed to keep maximum stroke, even with a lower ride height and are finished with a KTL coating for an extremely hardwearing finish.
  • AST 4150 comes with Double Digressive Pistons

How a Monotube design works?

Monotube design is essential for performance. The oil and nitrogen are separated by a floating piston, and allows the use of a larger piston, increasing the damper performance and sensitivity felt by the driver, all this added together produces more grip, gives more control and driver feedback from your vehicle.

What is a rebound adjustment?

Rebound controls the rate of extension of your shock absorber. By changing the rebound you can directly change the characteristics of the vehicle.

Technical specifications:

  • Floating piston design with high pressure nitrogen eliminates cavitation around the piston.
  • 22mm / 14mm diameter shaft struts, non-inverted.
  • Steel cylinder body shocks, non-inverted.
  • Rebound adjustable (''Singles'').
  • Low friction seal.
  • Adjuster knobs permanently mounted on the dampers, no need for special tools.
  • Rubber bushings for ''eye'' shock mounts.
  • Optional spherical top mounts.
  • Optional DDP piston (double digressive).
  • Rebuildable and fully serviceable.
  • Optional custom valving.


NOTE: ALL AST Clearance kits are final and sold "As-is" with no warranty.  No returns, exchanges or refunds.

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