Dynomax Ultra flows with an X pipe is going to get you close to what you want. Youtube is your friend as far as exhaust though. Look up:
Go from there. An X pipe will have a little popping and will be raspier than an H pipe. What is your exhaust right meow if you don't mind sharing?
2000 Mustang GT Steeda #0048
Just because I give you advice, doesn't mean I know more than you. Its just means I've done more stupid ****.