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Did you not read my build thread? I made mine out of the diamond plate aluminum because it was free. Fits a 4" ID 9" long k&n with room to easily remove the filter. Could run a smaller 6"-7" clamp on and have plenty of space for a battery. I made this out of a bunch of pieces and had them welded together my dads fab guy said next time he will just bend one solid piece and weld the ends on. I'm running this on my trip this weekend and there's a knarly deep river crossing so we'll see how it does has a drain hole and slopes toward the shock and on each side like a gutter. Running a water repellant outerwears not pictured also though about making a Velcro on lid out of water repellant outerwears material as well for added water/mud protection.
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