• Everyone on site must sign the insurance waiver.
• Drivers and passengers must wear a properly fitting helmet and seatbelt on course.
• All passengers are considered to be either a student or an instructor, so novices are not permitted to ride together.
• Use Common Sense!
• Drive responsibly as you approach and leave the event. Hot-dogging it on the street makes us all look bad and could cost us our site!
• Drive cautiously on the grid/parking areas, there are pedestrians and other cars around.
• Children and pets are not permitted in the “hot areas” (active grid and course, anywhere you might expect to find a car with a helmeted driver).
• Don’t try to be a hero on course. It’s just an autocross run… if it gets away from you, back off and regain control safely. If the car starts to spin, put both feet in (clutch and brakes) and enjoy the ride.
• When working the course, never turn your back on a car and don’t run out in front of a car to pick up a downed cone.
• Drivers are required to work for at least one run group.
• Competitors are encouraged to monitor the results DURING each event and verify that all cars in their class (including your own) are appropriately classed. If a car is believed to be incorrectly classed, discuss with the driver or bring it to the attention of event officials. If a change is required, it must be presented to Timing BEFORE the end of the event. No class changes will be accepted after the event.
• Allowing competitors to make agreements that a certain prohibited modification is okay for a particular car in their class is a can of worms that we don’t want to open. To maintain fairness to all, we ask that you always compete in a class that your car is fully compatible with.
• Have Fun!

We have twelve classes, loosely categorized by modifications and tires. You’ll find no information for classing karts as we do not allow karts.

• R1 – Race Cars (all)
• R2 – Modified Race Tire (all)
• R3 – Stock Race Tire 3 liters and greater
• R4 – Stock Race Tire less than 3 liters
• M1 – Modified Street Tire 1 (ASP/BSP)
• M2 – Modified Street Tire 2 (CSP/ESP)
• M3 – Modified Street Tire 3 (DSP/FSP)
• S1 – Stock Street Tire 1 (SS/AS/BS)
• S2 – Stock Street Tire 2 (CS)
• S3 – Stock Street Tire 3 (FS)
• S4 – Stock Street Tire 4 (DS/ES)
• S5 – Stock Street Tire 5 (GS/HS)

Read through the categories below, it’s all pretty straightforward. If you have any questions, feel free to discuss them on the Forum or email us and we’ll help.

As with most motorsports organizations, what FAST calls “stock” isn’t really stock. We allow a certain set of basic modifications. But, since we had to call our “least modified” set of classes something, we chose to call them “stock.” If you autocross with other clubs, be aware that FAST stock bears no resemblance to ANY other club’s “stock!”

Is your car stock?

If your car is a US-market production vehicle, it is eligible for stock if it has NONE of the following modifications. Any and all modifications not listed below are allowed in the production classes. (don’t go overboard and make us change that!)

• Internal engine modification (crank, cams, rods, pistons)
• External engine modification that alters fuel delivery (alternate carb, altered fuel injection, fuel-air ratio adjusters)
• Modification to engine control electronics (including code changes, reflashes, replacement ECUs, piggyback ECU’s or other devices that alter or inhibit signals from or to the engine or the ECU) that are capable of increasing fuel mixture or raising the level of boost.
• Addition of non-factory forced induction or modifications/upgrades to a factory forced induction system.
• Non-factory engine replacement
• Welded chassis reinforcement, including welded roll bars/cages
• Alternate or altered springs
• Modification which places alignment, suspension geometry or ride height parameters beyond factory tolerances. (Regardless of factory tolerances, camber up to -2.0 degrees is permitted and camber in excess of -2.0 degrees is prohibited. Crude on-site camber measurement, if requested, will be +/- 0.2 degrees.)
• Alternate main body panels (doors, hood, trunk lid, fenders, roof panel, windows)
• Removal of significant factory interior parts (seats, interior panels)
• NOTE: A Stock class car may be upgraded with factory optional parts (such as original equipment performance package springs) and stay in a Stock class only if those parts are available as an option on the same model and year of car and that car is classified in the same class.

Street Tires?

Made it past all the “stock” qualifiers? Good, now let’s look at your tires. This is simple. If they are DOT approved and their treadwear rating is 140 or greater (check the sidewalls), we consider them street tires. (NOTE: A handful of cars come from the factory with tires that do not meet this qualification. It’s a big deal to us! If your tires have less than 140 treadwear, sorry, you can’t compete in a street tire class.)

If you’re on street tires, all you have to do now is find your car on the Stock Class car list:

• Stock Class car list by class
• Stock Class car list by make

Race Tires

If your tires don’t qualify as street tires, you must compete in one of the two Stock Race Tire classes. They are simply divided by engine displacement as follows:

• R3 – Stock Race Tire 3 – 3.0 liters or greater
• R4 – Stock Race Tire 4 – less than 3.0 liters
• Forced induction (turbo or supercharger) bumps engine displacement by a factor of 1.5. (e.g. a 2.2 liter turbocharged engine would be classed as 3.3 liter)
• See Safety Rules for requirements related to open-top cars with race tires.

If your car does not meet all of the Stock Category qualifications, you may qualify for the Modified Category. The Modified Category is intended for modified, but streetable cars on street tires.

Qualifications for the Modified Category are minimal:

• Tires must be treadwear 140 or greater
• Cars must be streetable, but modifications are unlimited
• Bump up one class for adding forced induction
• Bump to donor class OR up one class (whichever is higher) for a significant (+25% HP increase) engine swap that is not a common bolt-in swap that results in a factory-available (US market) configuration
• Even though modifications in the “Modified” classes are largely unlimited, we would prefer to see a car that has clearly been stripped, caged, and otherwise turned into what most people would consider to be a “race car” in the Race Car class.

Find your car on the Modified Class car list. (NOTE: this list is completely different from the Stock Class car list)

• Modified Class car list by class
• Modified Class car list by make

FAST is an organization designed by and for casual autocrossers. As such, most of our members compete on street tires, and we don’t have or need a lot of race tire classes. If your car has race tires, your choices are few and simple.

Stock Race Tire Classes

If your car meets the Stock Category requirements (see above), but your tires don’t qualify as street tires, you must compete in one of the two Stock Race Tire classes. They are simply divided by engine displacement as follows:

• R3 – Stock Race Tire 3 – 3.0 liters or greater
• R4 – Stock Race Tire 4 – less than 3.0 liters
• Forced induction (turbo or supercharger) bumps engine displacement by a factor of 1.5. (e.g. a 2.2 liter turbocharged engine would be classed as 3.3 liter)
• See Safety Rules for requirements related to open-top cars with race tires.

Modified Race Tire Class

If your car is streetable, but not on street tires, this is your class. Modifications are unlimited, so this is not a class for the timid!

• R2 – Modified Race Tire

Race Car Class

R1 is our single class for race cars. We define a race car as follows:

• Any non-production based vehicle (such as kit cars or tube-framed “look-alikes”) will be classed as a “Race Car” unless deemed an appropriate fit for a lesser class
• Even though modifications in the “Modified” classes are largely unlimited, we would prefer to see a car that has clearly been stripped, caged, and otherwise turned into what most people would consider to be a “race car” in the Race Car class.