Discourage fuel theft with the Neck-it! anti-siphoning device from FuelDefend.
Products available for all Class 7 & 8 model trucks in North America.
Durable with tough, thick side walls.
Designed to obstruct tampering with or removal of fuel.
Doesn’t restrict fuel flow during fueling. Tested to 50 gallons per minute flow rate.
Easy installation procedure and no maintenance required.
No riveting or drilling; and no damage to the fuel tank neck.












