From what I've been able to tell (and this is just through looking about and reading so I'm probably wrong with the order), it goes;
1 - Replace normal filter with KN/DNA item
(This)
2 - Replace factory snorkel with DNA open one
(This)
3 - Replace side of airbox with the big panel filter
(This)
This way the first step just increases flow through the filter, second step increases the amount of air that can get to that filter, and third step adds a second filter to double the amount of air coming through. Maybe a different order, so if anyone else says something different probably listen to them
