2024 Classification of Cars

A - Stock Class

Low-horsepower, Rear Wheel Drive cars. Typically under or around 250hp and 3.0L of displacement or below. Only allowable modifications listed below.

A - Modified Class

All A-Stock derived Rear Wheel Drive cars with modifications not permitted in Stock class. No boost modifications, or significant power-adders allowed. Vehicles in A-Stock with naturally-aspirated engine tunes are classified here.

B - Stock Class

Low-horsepower Front Wheel Drive and All Wheel Drive cars. Typically under or around 200hp and 3.0L of displacement.

B - Stock Plus Class

"Hot Hatch" and other high-performance Front Wheel Drive cars (Civic Si, Focus ST, VW GTI, Mini Cooper S, etc.)

B - Modified Class

All B-Stock and B-Stock Plus cars with modifications not permitted in Stock class. No boost modifications, or significant power-adders allowed. Vehicles in B-family classes with naturally-aspirated engine tunes are classified here.

C - Stock Class

Most cars that do not fit in the above classes. Higher HP or displacement vehicles (such as European sedans or coupes, low-HP muscle cars).

C - Stock Plus Class

All High-Performance cars, typically with large engine displacement or high factory induction boost settings.

C - Modified Class

All cars as listed above in C-Stock and C-Stock Plus class with modifications not permitted in Stock class. No internal engine or boost modifications, or engine swaps, allowed. Vehicles in C-family classes with naturally-aspirated engine tunes are classified here.

D - Class

Any A, B, or C-family cars with significant internal engine and/or boost modifications (forced induction engine tunes), as well as engine swaps from the same manufacturer (example: Honda K-Series in Civic, Nissan SR20DET in 240SX).

Unlimited - Class (UNL)

Significantly modified vehicles, such as vehicles with engine swaps from a different manufacturer (ie: RX8 with a GM V8, Miata with a Ford 5.0). Vehicles equipped with slick tires (example: Hoosier A7 or Toyo RR, or similar)

Specialty - Class (SPEC)

Specialty vehicles under 1000 lbs., and vehicles that do not have the ability to become street legal (Formula SAE, F1600, dwarf race cars, etc). Go-karts are not permitted.

The organizing committee reserves the right to classify, on-site, any vehicle that does not readily fit into any of the above car classes. Got a classing question? E-mail us!

Stock Class Clarifications

Stock Class Buffet

You may choose UP TO FIVE items and remain in your respective stock class. This will be set up on msreg, upon registration, drivers will have the option to check any of these boxes (or none).

  1. “Quality of life” improvements: minor interior, steering wheel/short shifter/etc. Stripping the interior constitutes a major interior change that moves the vehicle to its respective Mod class. Deleting airbags is not permitted in stock classes
  2. Bucket seats with or without harnesses. Deleting airbags is not permitted in stock classes
  3. Any make of shock absorber/strut assembly, including adjustable dampers but not including spring rate changes. The original factory spring and rate must be maintained in stock classes
  4. Suspension bushings (example: polyurethane)
  5. Minor aftermarket camber components (example: shims/camber/crash bolts/slotted struts). Control Arms must remain stock, camber plates are considered non-minor
  6. Any modification of the exhaust system from the catalytic converter back. High-flow catalytic converters are also acceptable. Decibel limit enforced for participation
  7. Any modification to the air intake system. Modification and/or replacement of the Throttle Body (fuel injection) or Carb not permitted
  8. Addition, replacement or modification of one sway-bar. Modification (includes addition or removal) of more than one sway bar is not permitted in stock classes
  9. Chassis bracing including convertible roll bar, but not including a half or full roll cage

    10. Note: The organizing committee reserves the right to classify, on-site, any vehicle that does not readily fit into any of the above car classes. Got a classing question? E-mail us!

    SUV eligibility requirements:
    CASC-OR (Canadian Automobile Sport Clubs - Ontario Region) have the following regulations regarding SUV vehicles in autoslalom competitions Overall height versus track width (distance between the two front wheels, side to side) need to be 1:1 maximum. The possibility of a roll-over incident is higher as we know with crossover and SUV-type vehicles, and the CASC regulation firmly stipulates the overall height cannot be greater than the track width.

    Noise Limits:
    Adequate muffling devices must be installed on all vehicles with a sound level to a maximum of 96 decibels unless there is a lower noise limit required for that facility/track listed in Appendix I, or in the Supplementary Regulations. Organizers may apply to CNSC for lower noise limits if the facility/track requires. Such limits must be sent out to all competitors in the Supplementary Regulations 60 days in advance of the event and must be posted at the site on the day of the event. Please note that some facilities require a lower decibel reading and, in order to compete there, vehicles will have to abide by those lower decibel limits.

    Measuring shall be done from a distance of fifty feet from the vehicle wherever safe to do so. The final decision as to adequacy shall rest with the Steward. Any vehicle deemed to be excessively loud must not be permitted to compete without acceptable modification being made, regardless of the existing exhaust system. Please note that some facilities have their own measurement procedures and, in order to compete there, vehicles will have to abide by those measurement procedures. Event organizers should include a notice in the event’s supplementary regulations when such measurement procedures occur.