Upgrade your 5.9 Cummins 1998.5-2004 with the Airdog II-5G A7SPBD354 DF-100-5G Air/Fuel Separation System. Designed to enhance engine efficiency and fuel flow, this advanced system features a Demand Flow Design that recirculates fuel through the filter base and an integrated Diaphragm Fuel Pressure Regulator for optimized performance. The system reduces aeration with its low flow return and includes larger ports and a 12-gauge wiring harness for reliable operation. Proudly equipped with 4G motor technology, it delivers quiet, dependable performance. Backed by a lifetime limited warranty, the Airdog II-5G is your key to superior fuel delivery and engine efficiency.

• Boost engine efficiency with advanced Demand Flow Design
• Optimize fuel flow at higher pressure for peak performance
• Minimize aeration with low flow return for cleaner fuel delivery
• Ensure reliability with a 12-gauge wiring harness and robust connection
• Enjoy enhanced power with increased port size and 4G motor technology