need advice on exhaust v6

I am new to this forum and was hoping to get some good advice on what muffler to install on my 2003 f150 with the 4.2 v6. I am looking for a good deep sound if possible. I am planning on changing the muffler and having duel exhaust from the rear of the muffler out to the back of the truck. Thanks for any advice.

Flowmaster 40 series