Single NX | Diesel Truck Heads-Up Class

1.   Weight

• 4,500 lb minimum with driver (weighed post-run).

• No margin of error.

2.   Turbocharger

• Unlimited single turbo.

3.   Nitrous

• Single nitrous kit only (one active system).

• One active nitrous solenoid is allowed.

• All nitrous lines between the bottle and the active solenoid must be -4AN size.

• All nitrous lines between the active solenoid and the nozzle must be -4AN size.

• Only one nitrous line is allowed to run from a solenoid to the engine.

• Extra nitrous kits (including additional solenoids) may remain on the truck during the race.

• On all inactive solenoids, the nitrous lines between the solenoid and the nozzles must be removed from the nozzle. You can remove the nozzles and install plugs and zip tie up the inactive lines to make switching between classes as easy as possible. This makes the single active -4AN system easy to verify during tech.

• Larger lines (-6AN or -8AN) may remain connected to inactive solenoids, but those lines must stay disconnected from the bottle.

• No staged systems or multiple active solenoids feeding the engine.

4.   Racing Format

• Heads-up.

• Instant green (no amber on the tree).

• Chip-draw pairings every round (no fixed ladder).

• Win light only — no timeslips shown or given.

• Single elimination.

• Red light = loss (first foul wins in the event of a double red).