If you are talking about the sheet metal heat guards, I wouldn't worry. With a decent set of wires you don't need them. If you still want to use them, get a can of PB Blaster penetrating oil and soak them down the exhaust manifold bolts real good. Let them sit over night before you start working on them.
You'll need a thin wrench to hold onto the bolts, and a good six point socket to remove the nuts. The PB Blaster oil is a miracle on exhaust hardware. I have yet to break or strip anything after using it.