Interested in cutting my back dash to put 2 10" ev and then 2 12" JL subs in my trunk with 2 amps

 

What's 10" ev ?
It would be lot of work to cut an reinforce the rear deck. I'm sure it's possible, anything is. I have not seen anybody do it though.
The easier and far better approach imo is to go with an infinite baffle setup like many of us have done.

 

I have seen some pics over the net Tl´s with s speakers and subs on the rear deck, as Gregerst said "It would be lot of work to cut an reinforce the rear deck" and also you will have to consider dynamat to reduce rattle