I have both the stauns and the ARB unit.

I prefer the stauns for ease of use and have it set to 18 psi. If I want any other pressure, I break out the ARB.

I made my own . This is Version 2.0 that I clearly cobbled together.

To deflate, I hook up all for tires, then use the release valve to deflate them tires at the same time, to the same pressure. It takes about 10 seconds per 5 PSI, and I just stop periodically to check the gauge on the regulator. I initially thought I could leave the regulator set to a specific PSI and it would auto-deflate, but the release rate is so slow it took like 40 mins to actually deflate the tires from 40 to 15 PSI, heh.

To inflate, I hook the coupler to one affixed to my rear bumper that comes from my pump. However, because I used a regulator valve on the inflator/deflator, I can keep my pump's line pressure at 90+ PSI, and the valve on my inflator / deflator simply starts to hiss when I reach target pressure. It takes 9.5 minutes to go from 15 to 40 PSI, and they are all at the exact same pressure.

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That is a great idea! There's a profitable business in there somewhere?

Haha feel free! I have far less time than money these days so if you want to take the time to put a few of these together, have at it! I think it would have cost me something like $50-60 to make, but you could probanly get those costs down with a bulk order.

I used the following supplies, purchased from mostly ebay

--6mm Pneumatic tube (about 40ft I think).
--6x 1/4 NPT Male to 6mm Push Connector
----(2 on the inputs, and one for each tire).
--2x 6mm Push Connection Y fitting
--4x Closed locking shrader connections
--Basic inline regulator from Harbor Freight. (Hook the outlet side to the tire system, and plug the inlet side).

--Version 2.1 will replace all the brass T-fittings with a 5-way brass block so dramatically decrease the size of the object. There is one on Amazon for like $12.

I just purchased the Staun's. I'd rather pay for quality that will last. Seems much better to just screw these 4 in to each tire and wait 5 or 10 minutes and be done with it.

I use Coyote, no complaints and no issues.

I have each set up at different PSI for different scenarios.

I've never heard anything good about a cheap set of deflators. Nobody is ever satisfied.

I bought a set of Stauns about 10 years ago and still use them. I wouldn't buy anything but Stauns, but I'm the type to buy the nice stuff up front so I don't have to worry about buying crap and being upset.

Yup, Staun or Coyote, same thing:

STAUN DEFLATORS - HOW THEY WORK - Coyote Enterprises

I ordered Real 4X4 4 Tire Air Deflators for Offroad Vehicles. Does anyone have any experience with these?

I made one also. It deflates (inflates) all 4 tires at once to exactly the same psi.
30 psi to 15 psi in about 2 minutes. Back to 35 psi in about the same with the home shop compressor. (had to go to 35 to turn off the TPMS light, then back down to 30)
Cost with 100' hose (only used 50') was around $50-60.

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