mp08Product Description. In keeping with the Gen 1 source material, MP-08 Grimlock is based upon the nostalgic tripod-stance concept of the tyrannosaurs; his robot mode offers a wider range ofThe HydraForce MP08-20 is a 2-way, manual pull to shift, spring return, screw-in, cartridge style directional hydraulic valve. In the neutral position the MP08-20X valve blocks flow from port 2