Well I have been racing a b13 at 2250 lb with AGX/HIPER combo and I have been looking around for better options that can fit my weekend warrior budget to be more specific around 1,200$ and I finally have an offer from a local auto parts who is giving me a very good deal on progress group coilovers and I was told that the standard spring weight is 350f and 250 r and that they were not adjustable that they are just tuned for the spring weight but if I order them I can change the weight to my liking for an extra charge and I will like to know from the guys that still race this dinosaur to tell me if Im good with the original spring weight or if I have to go a notch stiffer and if this set up is way better that the AGX / HYP combo.