These cars are fairly close to cars that are driven on the street, and are usually dual purpose automobiles. Permitted modifications include any DOT-approved tire, any shock that attaches to the stock mounting points, any exhaust from the catalytic converter back (subject potentially to local sound control), any brake pads, any front sway bar, any wheels of stock dimensions and offset, and addition of a race harness.
Cars prepared to Road Racing Showroom Stock rules are permitted to run in Stock, but are not permitted to "mix" rules between the two classes.
The stock class is split up into sub-classes organized by performance. They are lettered A thru H, in an approximate order of descending performance. There is also a class called Super Stock (SS). Examples of cars in A-Stock (AS) include: Porsche 911's, Turbo MR2's, etc. The most populated class appears to be C-Stock (CS), which includes Miatas and many BMW's. At other end of the spectrum, H-Stock (HS) includes cars with relatively low power-to-weight ratios like the Toyota Tercel and Honda Accord. F-stock is a class that is generally populated with the "pony cars" such as Camaros, Firebirds, and Mustangs.
Would the SVT be in the CS class?
What other cars would be in this class?