Just did my rear and question if it's needed up front with this kit. Thanks in advance.

 

I should mention I'm planning on disconnecting sway bars for a future run.

 

Only you will know. Go flex the front axle and see if it tugs the line out of place.

Lemme cheat- yes, you need it.

 

Flexing and disco'ing with 2.5 inch lift will not affect your front breather tube much as its mounted to the frame with some slack. But does have a chance of tugging off from the diff nipple. Just be sure you have it clamped down at the diff nipple to avoid it from tugging off. I would extend all you breathers if you plan on deep diving into water/mud. That includes your tranny and transfer case.