No he meant range as in how far between fill ups
Jay if you go with the k&n’s you will need to get a filter to cover the air intake temp sensor and one for the crank case vent, so you will need 5 filters.
If you go with the ramaire it will come with the extra crank case filter and the AIT sensor will plug into the back of the ramaire so it is a complete kit and fits under the claw easily.
If you have stock exhaust neither of those filters is going to improve performance much, if at all because it can only pull in as much as it can push out. The only benefit will be the convenience of not having the stock air system in the way.
Also if you make either change of filter system remember you will need to load the appropriate tune