They don't stop the suspension from moving up and down, the standard mounts allow virtually zero linear movement only lateral. I would say that until you enter a corner most drivers would be hard pressed to notice any change in the feedback from the rear of the car between standard and SRBMs. Certainly no change in harshness from the back on mine.nd if its lowered any then you should increase the baer size to 21mm, as the bottom out too easily as standard, remove 25-30mm of travel and keep the spring rate the same and the problem will be exaggerated.
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R H Davey Welding Supplies. I sell new and used welding equipment in the Hampshire area. I take on welding jobs in the evenings, ally casting repairs are one of my specialities but I can weld pretty much anything. PM me with your requirements.Some of my services: (See my for sale threads)
Engine mount/chassis repair
Solid Beam Mounts BACK IN PRODUCTION
Harness bars