I don't know anything about SP. But I heard it bumps you out of STS because of a safety type thing. Something about CF hoods not being crash tested. Similar to how you can't replace an airbag steering wheel in STS either. When I say "safety" I don't mean that's it's unsafe, just that it doesn't fit in the "spirit of the rules".
I think SP was originally meant to be more of a street legal class hence the name "street prepared", and it slowly turned into the bastard it is today. I believe they call this phenomenon "rules creep".
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Jeremy
Last edited by w0rd; 08-08-2007 at 04:47 PM.