Cowl induction + FJ cyclone pre filter?

Like what you’re doing but would really recommend not using foam… it’s a sponge and will trap moisture. Typically only 2 part foam will/ can be waterproof.
Try silicone, if the gaps are too big fill them in with scrap sheet metal then silicone. If you’re doing foam be sure it says waterproof.

$13 DAP 7565012530 Barrier Multi Purpose Project Foam, White

https://www.amazon.com/DAP-7565012530-Barrier-Purpose-Project/dp/B08CYLTPQJ?mcid=41f28f4b550635a582f7e01878ad7792&hvadid=693570188397&hvpos=&hvnetw=g&hvrand=2012411462532829618&hvpone=&hvptwo=&hvqmt=&hvdev=m&hvdvcmdl=&hvlocint=&hvlocphy=1018127&hvtargid=pla-952555637906
this one is pretty good but I still wouldn’t put it in my truck.


Maybe your location is dry enough to not be a worry but for most it would be a future rust issue.

 

Great idea, i'll take this route!

 

I need to drill out the wall between the fender area and the cowl area but concerned about metal particles falling into the intake inlet. I think my goal will be to use a vacuum and various smaller diameter hose schemes to vacuum it out. Also hooking the vacuum up to the particulate outlet in the FJ prefilter. It was such a monumental pain to get everything hooked up, I don't want to undo it all.

An additional benefit i'm noticing with the FJ prefilter is that it provides and outlet for water that gets into the intake.

 

Wrapped it up tonight. I still need to protect the nipple but I do like how accessible it is for emptying.

The goal for the wall was to maintain structure while allowing airflow and minimizing opportunities for dust to come from the fender to the inlet. Since it's a high pressure area it should be fine as is. The tubing allows drainage while forcing the lower rim of the inlet to be above reasonable water flow. If it gets too nutty water should leak out of the nipple.

 

I'm thinking about a stainless steel hinge attached to the fender liner that holds some kind of plastic cap to protect the rubber nipple from debris thrown up from the tire. I could reach up and pinch the nipple when I stop for the day.

Or I could cut and attach a plastic jar and lid to the fender liner and just reach up and unscrew the lid. That's a bit cludgey.

Anyone have any clever ideas on protecting the nipple?