Rear license plate head mount

[Longsnowsm]

I have seen the pics from radarbusters.com from the Canonball run of a rear mounted license plate head. I am wondering if this is a product that is compatible with existing M20 and M40 products or if this product is for sale yet?

Longsnowsm

[justinhardy]

That is an M40 with 3 on front and 1 on back.

[brgminiac]

Is this a custom mounting bracket for one of the M40 tranceivers?

Or is this a modified M40 tranceiver unit, which looks like its depth has been shortened to fit underneath the lip of the trunk?

[justinhardy]

Looks like the regular bracket to me. I just installed 4 of them and it doesn't look shortened or modified in any way. The dims are 103x50x18 mm.