Are we talking about the M.P. superstock springs or the aftermarket versions? I talked to Greg Luneak of Tri-City Competition some time ago and he told me that the M.P. ss springs were not very good. I talked to a guy at the Mopars-in-May show last weekend who told me the set of M.P. ss springs he used on his racecar lasted about 5 passes before distorting to the point where he thought driving his car was dangerous. He had a set made by Tri-City that were much better but he was looking to go with Cal Tracs as he was going to start using N02 and he thought he was to the limit of even his aftermarket SS springs.(low 6 second 1/8th mile) What is the real story on the M.P. superstock springs? -Bob