moves the piston very fast so that the chassis would hit the ground for instance the suspension reacts as depicted in fig1 to slow movement of the piston this is important to prevent the vehicle chassis from contacting the ground thereby interrupting the intended and desired travel of the vehicle piston rod 40 and piston head 10 travel within piston cylinder 60 as indicated by arrow 90 when the car lands from the jump piston head 10 has a round shape which engages cylinder wall 82 preventing fluid flow along the periphery of piston head 10 in this embodiment dampening member 20 lies on top of piston 10 and is secured with fastener 30 and washer 32 in another embodiment dampening member 20 may fit within a recess of piston head 10 so as to be flush with the surface of piston head 10 washer 32 is sized to cover dampening member 20 while allowing valve members 16 which extend radially outwardly see also fig2 the flexibility to bend as piston assembly 100 moves fastener 30 may comprise various fasteners suitable for connecting with rod 40 including but not limited to screws nuts and the like in other embodiments various alternative fastening arrangements may be utilized to secure piston head 10 to piston rod 40 consistent with the teachings of the present invention accordingly dampening member 20 comprises valve members 16 which extend radially outwards from dampening member body 20 corresponding with variable flow valve holes 14 in this embodiment variable flow valve holes 14 are formed within scalloped portions 18 which have a thickness less than the rest of piston or piston head 10 when piston assembly 100 is moving fast as indicated at arrow 90 valve members 16 flex.