2018 Classification of Cars

A - Stock Class

Low-horsepower, Rear Wheel Drive cars. Typically under 200hp and 3.0L of displacement. Only allowable modifications listed below.

A - Modified Class

All A-Stock derived Rear Wheel Drive cars with modifications not permitted in Stock class. No internal engine or boost modifications, or engine swaps, allowed.

B - Stock Class

Low-horsepower Front Wheel Drive and All Wheel Drive cars. Typically under 200hp and 3.0L of displacement. Only allowable modifications are listed below.

B - Stock Plus Class

"Hot Hatch" and other performance-trim Front Wheel Drive cars (Integra R, Civic SiR, Neon ACR, VW GTI, Mini Cooper S). Only allowable modifications are listed below.

B - Modified Class

All B-Stock and B-Stock Plus cars with modifications not permitted in Stock class. No internal engine or boost modifications, or engine swaps, allowed.

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). Only allowable modifications are listed below.

C - Stock Plus Class

All Hi-Performance cars, typically with large engine displacement or high factory induction boost settings. Only allowable modifications are listed below.

C - Modified Class

All cars as listed above in C-Stock and C-Stock Plus class with modifications not permitted in Stock class. Also includes any A or B family cars with internal engine and/or boost modifications, as well as engine swaps from the same manufacturer (ie: Honda B-Series in Civic, Nissan SR20 in 240sx).

D - Class (Open)

Home built/Kit-cars/Non-production/Vehicles under 1500lbs.

Vehicles with engine swaps from a different manufacturer (ie: RX8 with a GM V8, Miata with a Ford 5.0).

Vehicles competing on non-DOT approved tires.

Allowable Modifications for All Stock Classes

Note: The event organizer reserves the right to classify, on-site, any vehicle that does not readily fit into any of the above car classes.