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Yep, the stock setup is more of a cold air intake since it draws air from outside the engine bay. The air gets quite warm in that small space between the exhaust manifold and radiator that the so called cold air intakes put the filter. The stock airbox does a good job of keeping water out as long as you don't go deeper than the top of the tires. If water is a concern, a snorkel is the best route. My old Pathfinder uses a K&N filter in the stock airbox. I have done water crossings up to my headlights with no problems pulling water into the engine.

Whoops sorry looks like your pic is the uprate version. I've been looking at the other for use in Honda OEM fluid. Sent from my SM-N950U using Tapatalk

This stuff also gets high praise in the Acura MDX forums for the 2001-2006 models that have known transmission issues. Some people have put it in a transmission, along with fresh fluid, that just started shifting strangely and it has fixed it for an extended period meaning 10k or more miles. They have several formulations and a chart on their website for what to use it in. This one as I recall is for fluids that meet the individual car makers spec. There are others that can uprate a fluid - like take a generic Dextron 3 fluid and take it to the enhanced Honda equivalent. I don't know if Nissan requires this. I only owned manual transmission Nissans. Sent from my SM-N950U using Tapatalk

Man, it's been over a year since our announcement. Where are we? We're behind where we wanted to be. We still talk about projects endlessly (today's topic was rear disc brake conversions), but a couple events in our personal lives this year surely derailed us a bit. I think @TowndawgR50 will give a separate update, but in general, I'll take the blame for things being slow throughout the year. At this point, we are finishing up 6 kits (3 each of 3" and 4"), plus some other side parts to complete another kit already partially in the field. Four of those kits are spoken for among the PNW crew, leaving 1 each of 3" and 4". I'm not sure when we'll push those latter two kits out, likely after we've had some additional hands-on with the parts and installs. That's the focus right now. We're still discussing 2020 plans, but tentatively we're talking about a few short run kits here and there rather than anything full-fledged. Our work schedules and locations presented their fair share of challenges, and Jake and I both have a few personal projects we'd like to focus on, so we've been discussing ways to make our two locations a little more independent. Part of that will be transferring my current CNC plasma table to him once my new one arrives and is operational. That would put nearly all of the SFD-making equipment in his hands, plus give him a kick-ass tool for a ton of projects. Since I'll have a larger table, I'll probably be exploring bumpers and skids, but will also be able to supplement SFD parts and such, too. More to follow soon...