Doghouse Fan Shroud Velocity Ring

Align the velocity ring over the air inlet, with the two thiner tabs sitting on top of the air duct for the oil cooler, with one tab being close to the oil cooler, and one being on the opposite side sitting.

For aftermarket fan shrouds, there is not consistent lip for the velocity ring to sit on, and the air inlet isn't even particularly round.  What you want to do, is line it up so it's lined up side to side with the opening, and lined up at the bottom.  It won't look perfectly lined up on the top, but that's okay.

For an OEM fan shroud, the same tabs should be oriented in the same direction, but there is a nice consistent lip for the velocity ring to sit on, so you don't have to manually align it, it will just sit nice and firm in place.

Once you have things aligned, carefully hold the rightmost bottom tab in place, and using a 3.5 mm drill bit, drill a hole in the fan shroud through the bolt hole of the tab.

Temporarily remove the velocity ring, and using a 5 mm drill bit, open the hole you just drilled to 5 mm.

Install a rivet nut (supplied) in the hole and secure with a rivet nut tool using a M5 x 0.5 threaded fixture in the tool (An Astro Pneumatic Tool ADN14 Rivet Nut Drill Adapter Kit is what I use), but any rivet nut tool that has an M5 x 0.5 threaded fixture will work.

After installing that first rivet nut, secure the velocity ring using the 8mm long M5 x 0.5 mm bolt with a spring washer.

The repeat the procedure with the far left tab what is the thickest tab, being careful to maintain the alignment for an aftermarket fan shroud.

After installing the rivet nut, reattach the the velocity ring, with both bolts for the two tabs, and repeat for the final tab.

Doing it in that order will help to make sure that you keep the alignment correct for aftermarket fan shrouds.

For an OEM fan shroud, the order doesn't matter much.