R53/R56 or similar cars, I'm just trying to get an idea of finished fitment & any roadblocks besides cutting into sheet metal and spare panels. Has anyone seen a similar setup? The closest I've found are these 7.1" L6SE's https://www.diymobileaudio.com/forum...n-sds-pwk.html It's hard to search for "8"- any help is appreciated.

 

That thread is probably the best example. Just don't use the clay and don't make MDF baffles without waterproofing them.

Take a look at the drawing of the speakers you want to install and you'll need to make a baffle to make it fit. As long as the basket diameter or magnet can fit through the 5.5in sheet metal opening then you'll be good.