FIA Group A -
Highly modified and fiercely competitive cars, the Group A category was added to the
ProRally Championship in 2000. These cars must follow the global rules format specified by the FIA.
FIA Group N -
Very similar in basic concept to the SCCA Production and Production GT classes, these very
competitive cars must follow the globally recognized rules format specified by the FIA.
There are four classes within Group N, which allow this category's formula to accommodate a
wide variety of vehicles. Open Class -
This very broad class that allows for a tremendous amount of technical innovation. As with
all SCCA specification performance rally classes, the cars must retain their production based
appearance, but under-the-hood, virtually anything goes, and all-wheel-drive is
absolutely essential. Group 5 -
A two-wheel drive version of the Open class described above, following most of that classes
rules. A uniquely American formula, engine displacement is limited to 5.1 litres, with
supercharging and turbocharging allowed. Group 2 -
A small displacement, two-wheel drive class that also follows the 'anything goes' format
of the Open and Group 5 classes, but provides excellent competition opportunities for
cost-sensitive competitors and manufacturers. Supercharging or turbocharging is not allowed,
and adjusted engine displacement is limited to 2.4 litres. Production -
Performance Rally's version of 'Showroom Stock', this class features primarily 2WD cars that
are virtually unaltered, except for the safety requirements, with respect to manufacturer's
production specifications. Adjusted engine displacement is limited to 2.65 litres. Production GT -
Following the showroom stock foundation of the Production Class, GT cars are more powerful
and often are turbocharged. These primarily 4WD cars are allowed adjusted engine displacements
over 2.65 litres.
SCCA Rally Action