ANy reason for this?

[TexasNomad]

Other then making it sound cool?

 

[1985 Ford F-150]

On a diesel id say it might help with performance a little but its mostly for sound.

 

[Truckin4life]

Sound....
Looks like the sensor is passed the cut out, so it will start throwing codes eventually...

 

[Bricks]

Lower exhaust gas temps....sure would stink inside the cab though