This is where i plan to install the sub for my Z. I am going to use a 10" Pioneer Premier Shallow Sub. I am still not done but i think that it will be nice when completed. I will need to fabricate the plastic cover that goes over the spare tire out of 5/8" plywood to make sure that the sub is flush with the trunk floor.
I am adding an Alpine MRP-M500 for the sub and i will use the factory radio to power the fronts and new rears that i will be installing later on.
I added pictures of the final installation. People can not tell that i have a subwoofer in the trunk.