He is asking about class in autocross, not what mods he should do...sheesh.
Anything that effects boost automatically puts the car in SM (Street Modified)or SMF (Street Modified Front-wheel drive). Since the GM Stage 1 doesn't involve a smaller pulley, you might be able to get away with DSP (D-stock Street Prepared) or STX, STX being a street-tire only class.
The thought is pure ambiguous
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Last edited by Droxity; 06-17-2012 at 01:00 PM.