What I did was order an extra tow hook cover plate just to be on the safe side and have a replacement that I put back in place if I didn't like the way it work out. It only cost a bit over $4
Attachment 55688

After removing the cover plate and inserting the Grimmspeed tow hook bar I used green painters tape to cover the opening working around the bar.
I then used a small exacto blade to cut the tape from around the opening I had covered.
Attachment 55695
Attachment 55696
That left me with a template that I could use to mark the exact place to put the hole in the cover, which was a bit of and oval rather than a round opening.
Attachment 55697
Attachment 55698

so much better!

I followed your direction and drilled with a 7/8" paddle bit as I don't have a 1". The Grimmspeed fit perfect and very snug. Thanks!

- AdrianG

Two cents
 

Wanted to add a few tips.

- I bought an extra BRZ bumper cover from the local (SoCal) dealership for $5.50, and it took about a week to get in.

- When installing the shaft into the car frame, don't forget grease! Also a torque wrench is a must, as it turned many more times than I would have expected.

- While some photos seem to show that the license plate is mounted in the lateral plane, it turns out it only fits on an angle. I have mine at about 10 degrees, which is a bit more than necessary but it gives me piece of mind that the bumper paint is safe.

After the relocation kit is installed, what do you guys use to cover the old front plate holes? Just some bondo or black bolts?

For anyone with a 17+ BRZ that wants to order a spare, the part number is 57731CA510 not 57731CA210.