A vehicle's suspension is the complex system of arms, springs, and dampeners that allow your car to absorb the impact of roads as rough as the surface of the moon. Considering the tremendous amount of abuse that these parts receive, it's understandable that they eventually degrade and affect the comfort and handling of your car greatly. When working on a suspension, be sure to refurbish opposing sides simultaneously in order maintain predictable drivability. It is also imperative to your safety that you torque all fasteners to the manufacturer's specifications.
Shock Absorbers & Struts
Shock Absorber/Strut Insert - Front
The shock absorber is used to stabilize the vehicles chassis over uneven pavement, during acceleration and deceleration. It essentially does what it's name says, it absorbs the kinetic energy of hitting bumps in the road.