I may be doing my header install this weekend. I bought a used set of mac headers with y-pipe and cat and i want to make sure i have everything.
Here's what i have/ going to use

Jack Stands
Mr.Gasket Header Gaskets
02 Sensors
Zip Ties
Anti Sieze
Pb Blaster
Header Bolts
A friend or two to help out.

Do i need collector/y-pipe gaskets? Also where can i get y-pipe bolts because i know mine will end up breaking since they look so rusty.

Also what size tools will i need?

One more thing i heard it's good to have air tools what parts is it good to have the air gun on?