AEM Voltmeter Display Gauge LBZ The unique IRF design utilizes

The unique IRF design utilizes the depth of the OE filter box for maximum filter media and five layers of progressively finer mesh cotton gauze media provide maximum airflow for best performance results within the confines of the stock OE filter box

Built-in adjustable regulator (present @ 10 PSI)

DF-200 is recommended for Ultra High Performance Duramax diesel engines

FP-150 is recommended for highly modified Powerstroke Diesels

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AEM Voltmeter Display Gauge LBZ The unique IRF design utilizesAEM 30 4400 The AEM Digital Voltmeter Gauge combines unsurpassed accuracy, speed and control with an easy to read digital LED interface that displays voltage in 1 volt increments, and a sweeping LED "needle" that lines the edge and moves as voltage changes from 8 to 18v. The voltmeter gauge's digital readout will automatically increase and decrease in intensity due to the built in ambient light sensing photocell.