Fits in Prius!
I installed them in the front door of my 2012 Toyota Prius. They fit without touching the glass nor the inside door panel (with some dremeling of the panel) using SAK010, 1" deep speaker adapters. You will need to drill two holes for the speaker adapters in the door but some silicon should prevent rust and rattling. Note, the recommended Scosche 142SAT69 speaker adapters don't fit a 2012 Prius and you will have to drill those out too so don't bother getting 6 1/2" speakers for the front. You might as well get 6 x 9's and get better sound. UPDATED 2/4/13: The bass completely disappears when the temperature drops to around 15 degrees F.
Pros: Rich bass response.