I was running Boss 302 springs with Koni Yellows. The additional 1/4" drop from the Konis made the front too low and I wasn't happy with the soft front rate. I swapped the fronts for 2012 GT500 SVTPP springs (234lbs) and the rears for Boss 302 Laguna Seca springs (191lbs). The car sits perfectly level, about a half inch dropped from Track Pack height. The handling is phenomenal with my front sway bar set to second softest and the Konis set to 1 turn from full soft all around.