I Prefer ZZP's poly mount it may be twice as much but even the SR mounts have a hydraulic center and are prone to **** ups.
Sure Zzp is a great option but solid rubber mounts are just that there is no fluid in them meaning they are not hydraulic in any way. Hydraulic mounts have fluid inside that allows for more movement in the mount for a comfortable compliant ride.
06 GXP | 222/227 cam/cartuning turbo kit on 8psi/meth/e85 coilovers/ still on stock trans at 130k