Hated them on the street car and ended up buying a new subframe to go back to rubber. Transmitted a lot of gearbox noise and any movement in the axles. Did stop axle tramp, but new subframe bushes did the same thing. Solid diff mounts was just as much an issue, ended up modifying some Holden ones to replace the solids. Pit Nissan don't sell them either of these anymore, used the Nismo ones on the other suspension arms and they were good, slightly harder than stock but acceptable. Solids are great on the race car or if you don't care 'at all' about noise and vibrations.
