In my own experience an H pipe will take away some of the objectionable noise as well as pick up a little low, and mid range torque. I used a 2 inch pipe for the crossover between the head pipes in a few customer cars as well as my own.
It will change the exhaust note some, just to be forewarned, but I always thought it was favorable to just true dual exhaust sound, especially if the exhaust crackled such as glass pack mufflers do.
