So I just purchased my 2001 s4 last week and I'm planning on redoing my speakers, i have 4" for the front door, 5 1/4" for the rear doors and I'm planning on doing two 8" woofers in the rear deck to retain stock looks, but also have a slight more bump than stock. My question is does anyone know if 8" woofers will fit in the rear 6.5" holes without modification? I don't mind modifying, I just wanted to see if it was possible.