The Longhorn Fab 201058-G is a plug for the air-filter indicator port. It replaces the plastic filter minder with an aluminum plug and a rubber grommet.

That minder gets brittle and cracks. Pieces of it can get pulled into the intake. This plug closes the hole on a stock box or an aftermarket intake. It does not tell you when the filter is dirty. You check the filter yourself. The grommet is included.

It fits 1999–2007 7.3 and 6.0 Powerstroke trucks, 2003–2009 5.9 and 6.7 Cummins, and 2001–2019 Duramax trucks that use this indicator port.

Fitment

• 1999–2007 Ford 7.3L and 6.0L Powerstroke
• 2003–2009 Dodge 5.9L and 6.7L Cummins
• 2001–2019 GM Duramax
• Aluminum plug and grommet
• Stock or aftermarket intake
• Indicator not included

If you still want a restriction reading, this is the wrong part. This one deletes the minder.