2.5 to 3.0 Exhaust

What size are your collectors? That is what size your exhaust should be.

An H pipe will always be advantageous, partly in balancing each side, but also in quieting it down a bit. An X-pipe is better in function, but not always possible.
Yeah I probably should have specified that, my apologies!

I have TTI headers with a 3 inch collector. I was also thinking about going the X-pipe route but from what I've heard in videos it's not as "muscle car" sounding, a bit more modern. I'm hopefully trying to achieve a loader, deeper exhaust sound without sacrificing whatever performance I currently have.