The air intake heater, which is found in ’99.5 and up 7.3 Powerstrokes, blocks close to 20% of the air path in the intake manifold and creates significant turbulence in the airflow going into your engine. By removing this heater, and replacing it with the intake-heater delete plug, you eliminate the restriction in your airflow and eradicate the turbulence created by this relatively unnecessary part.
An additional feature of the intake-heater delete plug is that it is drilled and tapped with a 1/8” NPT port which allows you to connect your boost gauge exactly where you need it, at the intake manifold. To install a boost gauge, simply remove the 1/8” plug (not shown) from the center of the intake heater delete plug, and insert the boost gauge fitting/sensor.