Hey I was wanting to put a free air sub where the bose 8" sub is, I have a non bose addition car, I was wondering where can i buy the bracket to hold the sub or anyone have one they can spair.

 

Just make one out of MDF.

You will also have to cut your rear deck and install the Bose grill.

You will also need an amp.

 

already get 2 12's in the trunk, i just wanted a little more "in cabin basss"

Where could you get a grill?

 

So you're adding a free air to the existing 2 12's you have?

Why don't you just port the sound into the car through the hole where the sub would go.

Get a rear deck that has the Bose cut out. It will include a grill.
Junkyard or dealer, or classifieds section here.