Pro Street Rules

Published 1/24/15

2015 Rules Changes Highlighted in Yellow

Please also read the ORP General Rules which apply to all races conducted at Ozark. For Non-ORP races, the sanctioning body rules of the track the event is being held at apply.

Engine & Drivetrain:

  • Any power adder acceptable.
  • Must run a collector style header. (no zoomies)
  • Any motor combination acceptable.
  • Engine diaper for oil containment is required.

Weight Requirements:

Base Weight 2800

  • Deduct 200 lbs for Nitrous Oxide
  • Deduct 200 lbs for Small Blocks
  • Deduct 400 lbs for Naturally Aspirated
  • Add 200 lbs. for Twins, Screws, and 5″ and bigger bore space blocks

These weight breaks are to be compounded or added together.(i.e. A naturally aspirated small block gets a 200 lb break for being a small block plus a 400lb break for being naturally aspirated meaning it can run at 2200 lbs.

More examples -4.84 Bore Space Big Block Chevy on Nitrous 2600 lbs.

Twin Turbo Small Block 2800 lbs.

Twin Turbo Big Block 3000 lbs.

5″+ bore space Big Block with Screw Blower 3000 lbs.

Body & Suspension:

  • Funny car or one piece bodies not allowed even if equipped with doors.
  • Maximum front end overhang of 45” as measured from centerline of front spindle.
  • An approved extension may be used to reach 45” if the front end overhang of the body is less than 45”.
  • Doors required! Doors must be functional and able to be opened from both the inside and outside of the vehicle.


  • Cars will run on a .400 pro tree, for an 1/8th mile.
  • All cars must be able to pass track’s tech inspection – NO EXCEPTIONS.