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BHAF installation pics


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Yesterday I checked my air filter and found that a mouse had started chewing it. No gaping hole, but getting there. I realized that the factory air box is nothing more than a nice "mouse motel" and decided that it was time for a BHAF as they are covered with steel mesh and not so easy to eat through.I did a search and didn't find too much regarding how to mount this thing so I thought of making a steel bracket from 1.5" x 10" steel strap 1/16" thick, [see last photo]. I drilled a 5/16" hole in the end of the air filter and put a bolt with a large flat washer through from the inside and bolted the bracket to it using thread locker and two nuts so the bolt couldn't come loose (and go through the turbo). The bolt fits the hole very tight so I don't have to worry if it did happen to come loose. As you can see I used some RTV silicone to cover the nuts and prevent corrosion. I then drilled a 11/16" hole for the air filter monitor and installed it. I attached it to the fender with a exhisting 13mm fender bolt. I made that side of the bracket with slot instead of a hole, so that when I want to remove the air filter all I have to do is loosen the 13mm bolt and the pipe clamp on the other end, and lift it out.The filter sits about 3/4" below the hood, and has several inches of clearance under and around it. I did think of making a heat sheild, however, after talking to Mopar1973man decided not to. Mike says that they aren't necessary so I thought I would try it this way without one.The filter is a NAPA #6637 and was about $62 total.Any input pro or con is welcome. Always trying to build a better mouse trap (pardon the pun).Bob

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I wish I had known that part # yesterday. I didn't know there was a "big unn". Good thing you noticed as someone else can avoid making this mistake. It probably didn't cost a whole lot more. I see you have over a million miles on yours. Have you replaced your seat yet? That is some serious saddle time.

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That is what I'll do. Do you have a cover on yours? I had thought of that afterward. I wash my engine often and wondered how the water would effect the filter if I didn't cover it. I am just sitting here thinking that in heavy rain the filter could get a bit damp as well. One problem leads to another...Damn mice.

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mine is a bhaf from vulcan performance. just measured it at 10 1/2" long and 10 1/2" in diameter. i do have an outer cover but not sure i really needed it. i think it cost about $30 as i remember. the filter was $80 or $90. if i get 100k+ out of it it want be a bad deal. but i do like the price you paid.

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Is it really necessary to strap down the BHAF? I will be receiving mine tomorrow and was wondering. As big as they are, it looks like they can't move around very much. I ordered my Donaldson off Ebay shipped to my front door for $52. and some change. I made an offer and they took it. The shipping was $17.99.Mohok

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I am running completely stock. I wish I had known about the size difference before ordering, I got the part number from a post somewhere. I little bit of diameter makes a big difference in capacity, not only in air in but the amount of dirt it can hold which means it lasts longer. Next time.The only reason I elected to make a bracket was just to get it up off the studs sticking up below, and that it would be stable and not rub on anything.The heat sheild wouldn't have been hard to make, but probably not worth the effort from what Mike says. The heat would actually work for me in the winter months. It would probably be worth making a duct to pull air over the turbo into the engine in the cold months. It would give warm air to the engine and cool the turbo, reverse it in the warm months. I need to think about this one more.I did think about taking the stock air box and cut the bottom off of it to use as a base for the BHAF. It would fit right back over the bolts.

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