I've had my Eventuri air intake for about a year now, and I decided to clean the filter. There's no easy way to do it. You have to remove the entire unit from the car, which involves pulling the connecting tube from the supercharger inlet and the Eventuri, and disconnecting the MAF sensor.
Once out of the car, take note of the following:
There's a big thin rubber band-like seal that goes around the connecting seam of the two body halves. Carefully lift and move that back on the body, or if you want to remove it to clean it (which I did), make sure you put it back on the correct half and side of the body.
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To take apart the unit, there are 3 screws you need to remove (you can see two of them above) on the metal tabs that connect the two body halves. The screws have an 8mm lock nut underneath, so you'll need an 8mm wrench to hold the nut while you unscrew them (you can reach them from inside of the short half of the body). There are small black plastic washers that go on each of these screws, so keep an eye on them so they don't fall off and disappear somewhere.
After you remove those screws, you can separate the body halves. The long half holds the filter, and you'll see 6 screws that need to be removed (I've already removed them in the photo below). Take note of the order of disassembly here; the mounting bracket goes on top, the round collar disc is under the bracket, and they sit on top of the filter. When reassembling, the mounting bracket goes over the collar disc, not under it.
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This wide hard plastic ring in the picture below is actually the top of the filter. The filter construction is very solid overall. When you lift the filter out of the body, there's a very thin, soft and flexible rubber gasket between it and the body that's easy to tear, so lift slowly and carefully. Half of mine was stuck to the body, and the other half was stuck to the filter. I removed it completely before cleaning the filter. It's VERY soft. In the picture below you can see some of it squeezing up through the screw holes on the filter.
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After carefully removing the filter so as to not tear the gasket, now you can clean the filter.
They recommend you use compressed air to blow out the dust from the back of the filter, but I didn't have compressed air, so I just used warm water and the spray pattern from the nozzle in the sink. When I first removed the Eventuri from the car, I had a feather and a piece of hay in it lol. There weren't any bugs though, which was good. I was surprised at how much dirt and dust washed out of it. I've only got about 2,500 miles with it in the car, but that included a long 700+ mile trip. After the initial rinse out, I sprayed filter cleaning solution on it (
@GRP sells the filter cleaner kit. Even though it includes spray oil, DO NOT use the oil. The Eventuri uses a dry filter and just needs cleaning). I let it soak for a few minutes, then used warm water with the spray nozzle to rinse out the filter. Even more dirt came out with the cleaner solution. I spray rinsed onto the back of the filter until there was no more soap coming out the front, just clear water, then let it air dry.
Reassembly is the opposite of the above procedure, however, if you removed the big rubber band that goes around the body, put that on first before you reassemble the filter pieces. Take care with that thin gasket between the filter and the body. When reassembling, MAKE SURE it clears the holes the screws go in before putting in a screw, because the screw will grab and twist it up otherwise (don't ask me how I know). Put the gasket, the filter, the collar ring and the mounting bracket all on top of each other first, then put the screws in. I kept everything slightly loose, so I could lift the filter edge just enough as needed, and used a small allen wrench inside the hole to push the edges of the gasket out of the way of the screw hole. Once it's out of the way (you may need to do this for each of the 6 holes), lower the filter to hold it in place long enough to get a screw threaded. Don't tighten any of them down until all of them are threaded.
Once they're all in place, FINGER TIGHTEN them using a star pattern, going crosswise like you do lug nuts on a wheel. They only need to be snugged down finger tight, don't crank them down. Also, before you put the screws in, pay attention to the orientation of the mounting bracket (see picture below) so that the wire loom is below, and the tall bracket tab above is aligned with the MAF sensor.
When reattaching the other body half, make sure the drain hole (you can see it inside in the picture below) is on the bottom facing down. Reassemble the 3 tab screws (don't forget the black washers) with the lock nuts, and again, just snug them down; don't over-tighten or you risk cracking the carbon fiber. The last step is to pull that rubber band around the body, over the seam (see first picture above) where the two body halves meet. Now you're ready to re-install the Eventuri back in the car.
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