9.0 Exhaust -
 
  • Custom or OEM allowed
    • Must be without leaks throughout the event
    • No straight pipes. ( Must use some type of muffler or resonator)
    • May not exceed 92 decibel @50 feet
    • Must use at least 2 flexible exhaust hangers
    • Must dump behind driver
    • May not be in excess of 6 inches under body