Calvert Racing just sent me a brochure and the mono springs are $298 and the caltrac's are $339. I've already gone the route of SS springs set up by BLE and they didn't help my problem of breaking loose and going sideways during every shift. I bought a pinion snubber but haven't installed it because I've decided on going with the Calvert racing setup. Most if not all advice has been to run these with Rancho RS 9000 shocks with one side of the shocks set two or 3 clicks softer on one side.
I have very little clearance between the tire and the SS springs on my car and really don't have any space to put the extra clamps neccessary to help SS springs work with the pinion snubber, so thats another factor in my selection. Some people that have used the extra clamps have said that they creep and are hard to keep in place anyway.
