Do I need one?

I've seen both pipes connected too one on a few sites including this pic from Tim Hoverds:

Pat...
Rescued attachment catch_tank_01.jpg

yes if you intend doing track days .needs to be 1litre capacity few people use the metal camping flasks

would ya look at the size of that-will have to hook up the 32" to see the page!!!!

im useless with puters dont know how to resize