I am going to be getting custom mandrel bent piping for my 98 LS, and I wanted to add an aftermarket straight through muffler. Who makes a muffler that provides a deep tone? People have been talking about the ES one and the Magnaflow. Also, what size do I need? On the Magnaflow web site there are many different can sizes, which would I need for a 2 door 98 LS? (I will be keeping my cat, but will not have a resonator) Thanks, Jason.