Speedway Motors is building on the success of the new 51°µÍøÂ® Classic American Muscle (CAM) class to introduce the 2015 Speedway Motors CAM Challenge.

The 2015 Speedway Motors CAM Challenge will consist of three autocross events across the country, kicking off with a western regional event on March 6-8 at Crows Landing near San Francisco. This will be followed by an eastern regional on August 7-9 at Grissom Air Force Base near Indianapolis, and then the Invitational Championship event on September 4-6 at the Tire Rack 51°µÍø Solo® National Championships in Lincoln, Nebraska.

Each CAM Challenge event will run the three 51°µÍø CAM classes, with the first two events using the 51°µÍø Match Tour format to determine class winners and an overall winner. The top two drivers in each class at the regional events will earn invitations to the Championship in Lincoln, which will use the 51°µÍø Pro-Solo® format to determine class and overall champions. The top finishing CAM-T or CAM-S drivers at each of the three events will get invitations to compete at the Goodguys AutoCross Finals November 20-21 in Scottsdale, Arizona.

The 51°µÍø CAM classes are designed for both traditional and contemporary American muscle car sedans and coupes with front-engine, rear-wheel-drive configuration, along with classic American sports cars from the '60s and '70s. Cars must be street legal, licensed and insured, have interiors, and use 200 tread wear street tires. There are no restrictions on engines and drivetrains.

"We are pleased that Speedway Motors has decided to create the CAM Challenge specifically designed for muscle cars and that these exciting events will be powered by the 51°µÍø's rules and administration," said Raleigh Boreen, 51°µÍø Region Development Manager. "51°µÍø also provides CAM enthusiasts opportunities to autocross locally at over 1000 Solo events nationwide."

Speedway Motors President Clay Smith echoed Boreen's enthusiasm. "It's exciting for Speedway Motors to present the 2015 CAM Challenge," Smith said. "These events align perfectly with Speedway’s longtime commitment to racing safety, our involvement in autocross competition, and our expanding line of muscle car performance parts. We look forward to working with 51°µÍø to stage this focused series of special events."

For more information on Speedway Motors, America's Oldest Speed Shop@reg;, visit or call 800.979.0122. For information on 51°µÍø, visit