Decat pipe

Hi guys, ordered a decat manifold what is being fitted this Friday. I also have a scorpion cat back exhaust. My decat pipe won't be here until the new manifold is fitted. Was just wondering is it literally taking out the cat and replacing with the decat pipe or are there any other parts needed to make it fit? Thanks
 
Its literally just a pipe that replaces the cat. You dont need anything else.

You could hold off a while and save some cash and get a sports cat! Scorpion do one.