So I was reading the fastrak sumamry a few weeks ago and noticed that a car prepared to any of the ST rulesets to run in their appropriate SP class. I am running a 2003 GTI VR6 in STX and was thinkign of running in DSP next year. I am a little confused though. If I use the ST allowance does that mean I can not run R comps? Does this also mean that I can not do any other SP legal modifications? (I was thinking of getting a LW flywheel for example) Thanks in advance!!!