[UntzUntzUntz]

Got a set of euro headers I will be installing pretty soon so I want to make sure I have everything prepped up before I start taking everything apart.

What's exactly needed to pull off a euro header swap?
So far I've gathered the following:
- 18 manifold studs Part #: 07129900298
- 18 manifold nuts Part #: 11721437202
- 6 Header gaskets Part #: 11627830667
- 4 Header to exhaust bolts Part #: 11621318568
- 4 Header to exhaust nuts Part #: 18301317898
- 2 Header to exhaust gaskets Part #: 11627830668
- Air valve control gasket Part #: 11727505259
- 8 Front axle reinforcement plate hexagon screw Part #: 31106772199

Which items am I missing and which are unnecessary?
I've read that pretty much everything besides for the header to exhaust connections are one time use. Is this true?

Also, sorta off topic, the euro headers I ordered look like complete trash compared to my OEM ones as far as cleanliness goes, any way to clean them before installing them? lol

Thanks!