Stock Classes:
900lb, 10hp or less
1000lb, 12hp or less(14-16hp run at 3200RPM)

Mod Stock/ Stock Altered:
800lb Mod Stock, 8hp or less No Billet Head
850lb Stock Altered, 10hp or less
850lb Mod Stock, 8hp or less No Billet Head
1000lb Stock Altered, 10hp or less
950lb Stock Altered, 12hp or less
1050lb Stock Altered, 14hp or less

60 Over:
950lb, 16hp or less
1050lb, 16hp or less

Pro Stock:
1000lb, 16hp or less
1050lb, 16hp or less

Limited Outlaw:
1500lb     See Class Rules
1600lb     See Class Rules