nothing out of the ordinary other than the cat to mani fixing kit.
off he top of my head you will need 10mm spanners, 19mmspanner? (for lambda), copperslip grease, hammer and blunt implement to knock cup washers out of mani fixing, a jack, axle stands. think thats about it.
it will be quite obvious when you get under the car. not the hardest job to do but it can be a pain in the ass if you are working with a jack rather than a ramp/lift.