I have two questions. I have been thinking about extending my breather lines on my diffs because the place I'm wheeling now had a ton of water but is it really necessary? I like the ones trail gear has that (http://www.trail-gear.com/creeper-breather). I should be able to get these and not have to extend my lines correct?

Second question. Anyone have any idea what size wing nut I need to hold down the top of the stock air box lid? I assume its metric and I would rather not go buy a bunch of different sizes till I got the right one. Mine has been missing since I got it and there is a small area water can get in around the rod sticking up the wing nut goes on so I have some rubber washers and was gonna put one of those and then a normal washer and the wing nut to try and plug that hole/area. Dont need any water in the engine

 

You can get bulk hose for cheaper then the trail gear breather, and yes if water is going up past your diff breathers that you have now, you do need them, unless you like to tear down diffs and replace stuff.

 

How exactly do i extend them? i have access to 1/4" black poly tubing at work but there isnt a place to attach it to the breather. guess i could get some kind of barb fitting possibly to replace the ones on there now that the tubing can connect to.

 

link with some part numbers and how to:
http://www.4crawler.com/4x4/CheapTri...html#Breathers

 

I ordered the nissan diff breathers that were in the article linked above and got my tubing and everything.