Abstract: An apparatus and method for a piston head assembly for an R/C car shock absorber provides for differing flow rates through the piston depending on whether the piston is presently in rebound or compression movement. A piston head may be constructed with a plurality of separate recesses further having at least first and second one way valve holes and a plurality of two way valve holes surrounding the central recess. In one embodiment, two sealing members fit within two separate recesses whereby the sealing member keeps the first and second one way valve holes generally closed. When fluid flow contacts the sealing member during the rebound stroke, fluid flows through the first and second one way valve holes moves the seal member to the open position thereby providing more fluid flow and a quicker rebound damping response.

Abstract: The present invention comprises an apparatus and method for a piston head assembly for an R/C car shock absorber which provides for variable dampening forces during compression movement based on how fast the piston is moving. During a first compression stroke, more fluid is allowed through a at least one variable valves, while during a second compression stroke faster than the first stroke, fluid movement is restricted through the at least one variable valves to quickly return the vehicle to proper riding position with respect to the road or track.