The "CRA NARC Civil War Series" refers to a well-known sprint car racing series in Northern California, combining the California Racing Association (CRA) and the Northern Auto Racing Club (NARC), specifically focusing on 410 Sprint Cars, known for high-speed, thrilling events often seen at tracks like Marysville, Placerville, and Ocean Speedway, with video coverage available from producers like Mills Video Productions. 

What it is:

CRA (California Racing Association): A historical sanctioning body for open-wheel racing.

NARC (Northern Auto Racing Club): Another significant sanctioning body, especially for 410 sprints.

The "Civil War" aspect: Refers to the intense, often fierce competition between drivers and teams within these powerful 410 sprint car series, a regional "war" for supremacy. 

Key Characteristics:

High-speed action: Features powerful 410 cubic inch engines on dirt ovals.

Iconic tracks: Popular at California dirt tracks like Marysville, Ocean Speedway, and Placerville.

History: A long-standing tradition in California motorsports.