I installed my Kubota 1140 high rise air intake (from Kubota, $250). It has a specially shaped manifold that fits in front of the rear wheel and connects to the existing air filter (rotated 180 degrees) then to the vertical pipe. This is a very tight space where proper air flow is important and that was the deciding factor, for me, to go with the Kubota part and not try to manufacture my own.
It's pricey, vertical pipe is metal, ROPS clamps are very sturdy with rubber pads, top cover and manifold are molded plastic of some kind. Design is excellent.
It's called a snorkel but am not sure it is water tight. I saw no such claims. The two lower manifold clamps are for a plastic-plastic and a plastic-metal connection. No rubber inserts or rings to assure a water tight fit. I don't intend to take it swimming, but things happen sometimes and you do what you gotta do. I'd feel better if those connections were enhanced by rubber someway, but perhaps it's wonderful and I just don't know it yet.
Packaging is deficient... short one rubber pad, short two short bolts, only two stainless steel clamps provided, three needed. Color is BLACK even though all 1140 ROPS are dark grey.
Clearly, given the amount of dust collected in the filter with only 18 hours on the machine, this air intake is more of a must than a luxury. Took me 5 minutes to blow all the dust out of the air filter.... and I had the needed long nozzle with angle on the end to get down into the inside and blow air back out...thus removing the dust and preventing driving the dust into the filter.
Overall, for the 1140, IMHO, you NEED some sort of high rise air intake to get out of the dust and reduce the time you spend cleaning the air filter and replacing it and to keep the engine breathing easier and ingest less dust.
Thanks to two guns for encouraging me to get it!
