This is the extension for my air intake on the 2011 RTV900 XT. I used 2" pipe/tubing. On the '05 model using the same method, I had used black pvc 1 1/2" drain pipe because of the tight fit between the bed and cab. I had no ill effects but was concerned about the limited air intake through the 1 1/2 " for such a distance- although the oem rubber hose was also 1 1/2". Anyway I went with the 2" on my new machine. This was a good fit because of the factory notch in the black plastic body frame where the pipe would go. However, because of the cage angle ,the $15 black pvc pipe I bought at lowes wouldn't fit without a bend. I did this instead. I had a 1 1/2" 90 degree black pvc L that I used to turn the oem 1 1/2 " hose up ,then I used a 1 1/2" to 2" rubber connector by inserting a short piece of 1 1/2" pvc drain pipe in each of the 1 1/2" ends to make the connection since that was what I had to work with. Then I went out with the 2" rubber end to a piece of thick ribbed heavy but flexible plastic hose. This hose came off of a nurse trailer used on the farm. I found this hose 10 years ago laying in the road! (I think it is sold by the foot at most real tractor dealerships with sprayer parts. ) I had to shave off some of the outside edges of it on the bench grinder so the 2" (90) degree pvc "cover" would make the fit at the top. I then inserted an angled piece of the 2" black pvc pipe at the top up under the roof to make it harder for things to get sucked into the pipe. This is held in place temporally with cable ties to see how it works. I pulled it in at the bottom with a cable tie also. You can see by the picture how dusty it is. The oem set up would have already toasted the air filter by now. If it works as planned, I will run a bead of sealant around the weak point- where the corrugated pipe and rubber connector come together should any water try to get in there. bordercollie
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