x pipe sounds great
I've never heard an h pipe but the Shelby comes with the X pipe racing exhaust and its sounds mean as hell. Only time it's really loud is when my foot is in the excelerator. Maybe someone close by you can take you for a spin and you can jude the difference.
Another moroso set up
I bought and installed the Moroso setup with wire reinforced hoses and Earl's fittings, first class setup IMHO. I included a picture ofthe inside of the can. The lower side fitting pulls the vacuum from the vavle cover and the nasty air filters through the element then...