Effective immediately

RULE CHANGE/CLARIFICATION for 2.5 Diesel Truck Class  — Exhaust:

  • Hood stack are permitted.
  • Must have two 3/8 inch diameter bolts that must be installed through the exhaust pipe in a cross pattern within one inch of each other as close to the turbo as is practical.
  • Hood stack exhaust must be at least 6” above closed position of the hood.
Scroll to Top