These notches were designed to give you as much axle clearance as possible but to not have to cut your bed floor itself. Most ppl that have worked on these trucks know there is only 3/4 of an inch in-between the bed floor and the top of the frame.
There is some trimming required on the bed brace itself. These are a weld in style notch. They are CNC plasma cut them broke on the press brake and welded together to make the install as simple as possible.
Left and Right Main Notch frames that saddle the frame rail
2 - Under Side caps pre bent to fit the cutout nice and snug
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