Quote:
Originally Posted by RudeTony
Chris - The picture is correct matey
The piston is forced upwards on landing and therefore the holes get restricted and hence more pack - Obviously they open with the force of the oil going through the holes but no as quick
Chris is right as always too - LOL 
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dont agree tony, as the shock shaft is pushed up the valves when on the bottom open allowing the piston to move quicker,
the idea of the hex is to allow an amount of oil in both directions, blank the holes and the piston moves as normal with oil going round the hex gaps and piston bore, now add holes and the damping is softer/less pack, now add valves and one way the oil can by pass as hex and holes, the other way the piston can only use the hex for the oil to bypass the piston
chris, some of the rally x guy used to use them as in the pictures to allow the suspension to react quick over smaller bumps, as chrsi d said to prevent the car from kicking up, the slower damping prevents a pogo reaction too, though as you know on a hard hit it will not have enough pack, which is why chris d says we need 3 way damping