mine is a 4 cyl turbo diesel kit and it is cheaper than the diesel universal stage 1 kit. probably the reason why it comes with a single nozzle holder and no "Y"connector.
based from the 3 installations here, the 2~10 psi
pressure switch is more applicable. since, i did not bother to check my boost pressure prior to order, i got the 6~30 psi switch. luckily, through the help of dvldoc, i was able to get one in Manila, a Hobbs switch with 4 psi nominal rating.
i just used the MPV and consumed 6 liters of water for a 100km city/hiway travel. a bit of a hassle if you have to refill every 50 km. at least now, i know when to switch off the WA injection. BTW i installed a 3liter capacity washer tank.
i increased the pressure cut in to delay the activation a bit.