r hand, looks like their showroom counterparts, but that's where the similarity ends. This class is reserved for 1990 or later two-door coupes and sedans that are limited to 500 cubic inches. These cars must have a milder powerhouse though. They must be carbureted, gas- burning cars. Other than that, there really aren’t many more limitations. Most drivers make use of extensive cylinder-head and manifold modifications and radical chassis and suspension changes that let them get that six-second elapsed time that they worked hard for. The insane class, Pro Stock Bikes, is Pro Stock's two-wheel cousins. The class is open to any 1985 stock-appearing, carbureted, gas-burning motorcycle. They are powered mostly by highly modified two- and four-valve engines and can cover the quarter-mile in 7.2 seconds at speeds of 190 mph. Their 70-inch chassis are also made from a composite carbon fiber. I think that this would be the most outrageous class to race in.If you know your classes and rules of the classes, it’ll make your day at the drag strip more enjoyable and meaningful. With cars such as these there will never be a boring time watching drag racing. We must also appreciate the NHRA for making a hobby and a career fair for everyone. They made this possible by creating the four major classes of drag racing, Top Fuel, Funny Cars, Pro Stock, and Pro Stock Bike....
