On page 20 it is stated that only approved box mufflers unless stated other wise for different classes. The rule starts out with stating chamberd exhaust below 85dcb. On the dirt sprint, what is allowed? Or is it the box muffler for all QSAC cars, and no tuned pipes? I thought tuned pipes were a chambered? Not tryin to start a debate, just want to know the facts.

Never mind, I found my answer on the forms page, go figure. But since it states muffler unless stated otherwise, what is the otherwise class?

Never mind, I found my answer on the forms page, go figure. But since it states muffler unless stated otherwise, what is the otherwise class?

Must be one of those areas that needs to be cleaned up. Sprint cars until recently were allowed tuned pipes.