for the headers you have to choose one or the other an X pipe wont fit onto headers.
Carl makes a headers to header pipe IIRC is also contains an X pipe type of connection as well
A color change is a huge undertaking but i would guess that you know that already.
Goodluck with your project
Ahh a color page chart is here
www.landsharkoz.com click on the colors link
Check out under the reds for the color on the bottom left of the color chart,
this is an awesome color if its applied correctly you wont see another car like it and it stays in the red family
Zyclamrot Metallic
Cyclamen Red Metallic
I know its not my car,
but this would be the color I would make if i was going for a color change to a red base