Modified

2015-usmts-rules.pdf
0.5 MB


USRA Modified Rules 

Modified rules will be set as USRA RHS modified rules with an 8000 rpm or less chip required.  
IMCA modifieds may run with the following provisions:

1. IMCA mods with flat tappet cams and cast iron cylinder heads are not required to run a rev chip.  If     no chip is used be prepared to show proof of flat tappet. (valve cover or distributor removal)
2. IMCA mods with flat tappet must be a minimum 2200 lbs. after the heat or feature race.
3. IMCA mods may run a 7” spoiler.

American Racer or Hoosier G60 and KK704 tires will be permitted at Southern Oklahoma Speedway.  Please check USRA rules for tire requirements. 

Mufflers are required.  Cone, 3-ring, or perforated inserts or IMCA609 mufflers are allowed. .