Knoxville Raceway New Muffler Rule In Effect Opening Night April 21st

Monday, April 16, 2012
Knoxville, Iowa โ€“ Saturday, April 21st is opening night at the Knoxville Raceway and as previously announced the only approved muffler is the Schoenfeld 14272735-78. This is the same muffler that was announced last November.

There are no other approved mufflers at this time. This rule pertains to the 410 and 360 sprint car classes as well the Lucas Oil Late Model Knoxville Nationals.

Questions about mufflers and other technical matters should be directed to Race Director, John McCoy at (641)842-5431 or

The Lucas Oil Knoxville Championship Cup Series - Pella Motors Race for Your School Night kicks off this Saturday at 6:45 pm. Over 80 cars are expected to compete for their chance to become the Knoxville Raceway Champion. For more information on the Knoxville Raceway and events at the Marion County Fairgrounds go to