Thanks for your great idea's on to re-use the stock speaker mounts.
I just replaced both the rear deck and front door speakers with Alpines speakers on my 07 SI sedan.
Your pictures and instructions sure made a lot more easy.
Few things I'll if it's OK? On my 07 SI the rear speaker grills pops off without having to remove the rear cover. If you carefully pry up the front edge of the rear speaker grills with two screw drivers it'll pop out.
Also on my sedan you don't have to worry about any issue's with the truck bars hitting the speakers. So it doesn't appear to be any depth issue's.
I also cut out the stock plugs ends from the stock speakers, then soldered the new speaker wires to it. And hooked the new wires to the Alpine speakers. This made it real easy to plug everything in.
The whole job took me 3 hours,most of the time was spent figuring out how the front door panels,and rear speaker grills come off.
