Such vehicles range from fully modified racecars to the average 17-second family sedan. This type of racing is the most affordable and gives little regard to the type of modifications done to the car, instead pitting driver against driver. Bracket racing works on a handicap system. This class allows only limited modifications and usually requires all interior components to remain in place, hence making larger investments unnecessary. Cars in these classes range from very lightly modified family sedans to very modified supercars running in the 10-second range.
Classes range to encompass a wide range of vehicles predicated largely on engine size.
In short, ISDS offers drag racing for all ranges of vehicles and all skill level of drivers. Vehicle-type and modification levels are largely unimportant. Qualified safety and technical inspectors are on hand at every ISDS event to help guide the less experienced drivers through the program, offer counseling and instruction on the safe preparation of the vehicle and to help ensure that all vehicle's competing meet all safety requirements. Such programs help keep illegal street racing OFF the streets and in a controlled environment, where it belongs. Adding to the excitement is the extensive print and media coverage, the cash awards paid out across all classes and the opportunity for other significant prizes.