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If i do this and only slip ons will i need a tune done right away? I live in wyoming so winter time itll sit more often but i want pipes as soon as possible (:

Hey Rick. Caught your video. This is exactly what I have been contemplating. However, just the high flow air filter is not enough. According to HD, it is very important to use the larger bore back plate. What was your end result? Tell me quick. My baby is at the stealership for this exact upgrade.

Did you need to add a tuner to the motorcycle since you increased the air flow?

Thanks for sharing. Nice clean inexpensive ac mode.

surprised this hasnt been modified and created into an after market purchaseable product from harley or someone else, patend it my friend!!!

curious if a tune with this setup and an exhaust upgrade would give the same results as other after market high flow systems

So with your airbox being modified it will have to be tuned

pretty cool man

Great video man just done it to my road glide I noticed slightly different sound I was wandering if I need to retune it thanks.

Great mod. I am curious as to how the epoxy held up over time. G-Flex epoxy would be the choice today although it is pricey for a one time use. I'm doing a similar mod to my new to me 15 Ultra

Thank you, Rick. I recently discovered this post of yours and liked the idea so much I followed your approach with the modification, and replacement of the stock air filter with the K&N equivalent. The result looks great, and the "butt-dyno" registered a slight improvement in throttle response during mid-range RPM. Thanks for taking the time to make such a helpful video.

Very nice. I too am a fan of the stock look. I might have to try this.

Looks good wish I would have watched it before I bought one

Great job!

Great job!

Thank you very much for the video, it helped me not to spend money on that Screamin kit. I'm Brazilian and your tip came at a great time helping me not to spend money unnecessarily!!!

Hey enjoyed your video. I'm in process of making a filter change on my 21 TriGlide. However was wondering about the external breather system that seems to be a hot topic. Like you I like the stock look rather than aftermarket look. What's your thought on the external breather with your stock air box ?

Nice one, just followed your guide and done it to my bike, thanks

ok here is the thing. stock air filter has 2 areas of restriction. first is on the surface area for air coming in so by changing the stock filter to K&N and cutting the black plastic made air come in easier and definitely higher flow. BUT BUT BUT the other restriction of air is from the back plastic housing into the throttle, that hole is smaller than the upgraded V&H or Arlen ness etc.. imagine you have a window of car half way down, when you speed up a peak load of air will be entering the car unless you open the window down fully you wont be able to have more air flow into your car right!! so that window in my example is the space you have attached to the throttle on OEM air filter housing and performance filters. great job for a stage 1 and 2 engines. but once you start going for stage 3, 4 and big bores then that wont be optimum. FYI there was no need to cut the above. simply just install the chrome without it and if you are worried about rain then you can have a breather cover in your saddle bag!!

Great idea and great video! Thanks for sharing. I just did this to my road glide, based on your video.

I did my mod on my 18 Roadking. Came out well, now looking to install a catch can of some type, and reroute the fumes/oil blowby to some type of catch can. No dripping on the ground for me

Nice job!

Great job

Jam up man extremely excellent job now the baby can breathe

I did the kit from harley by the time you spend 4 hr messing around doing what you did my time is worth more than $20 hr and I think k having front of filter open and back close off keeps air from flowing out the back and force the air into intake instead of pushing air out the back and with back closed of dyno numbers are better.

Looks like a great mod, thanks for sharing

I like that look also, you did a great job

Rick, thought you might want to see my version of your airbox conversion. I gave you full credit in the video. Thanks again. Here’s my RK. th-cam.com/video/LZQzJL1pDLQ/w-d-xo.html

Looks nice and nice craftsmanship and should work well when the bike is sitting still but with that said. When the bike is moving the air will flow though the front and right out the bottom which has a lower air pressure. So essentially you are creating wind flow and turbulence around the filter. The majority of the air will flow right through the front and out the bottom. It would be impossible for the intake to pull fresh air from the bottom. More harm than good other than cosmetics. You are better off with a stock box and adding K&N high flow filter.

Are you still running this setup?

Rick, installed my version of your excellent mod yesterday. All is well. Thanks again.

Rick, one more question if you don’t mind. Since you’ve added the HI-Flo filter and hi-flo air box, what’s your sense of how performance of your bike changed? Did you run it before fuel tuning? How was that if so? DK Customs has a video where they say these M8’s ECM can handle the increased airflow without fuel tuning. What do you think now that you’re done? PS, I’ve been sanding imperfections out and I am ready to install the screen. Haste makes waste.

Rick, what are your thoughts on using clear silicone adhesive instead of epoxy?

Rick, I just successfully roughed out the bottom intake you made, using a scavenged air box from a 114. Next step is epoxy after a little more sanding and finish work. Like you, I puzzled over the shape of the cut out, but like yours, it semi follows the general shape of the whole air cleaner assembly, and now, I will have a cool looking custom Hi-Flo air box on my Road King, that admits almost twice the. air. Thanks agin man.

Flat out cool Rick. One of my in laws had screamin eagle stage 1, and I think I got the old air box n screen. Hmmmm. Gonna watch yer video a bunch I think. Nice job.

I'm lovin' this hack! Ordered the donner air cleaner and K&N filter. Unfortunately the 1717 now comes as the wedge style. Still gotta flow better then stock with the mods you've described. YT is great for this kinda stuff.

I’am amased that you can clue this screen into the (i think is is PP material) airbox.?…do you tell us when its falling out..?😅. Because this material isnt to glue i thought…?.i order also an K&N for my RKS 107. 4 weeks delivery time. It looks good what you have done so far! 👍🏼👍🏼

Arlen Ness makes a "Use your old air cleaner cover" kit.. but not gonna save you much money

I'm going to the auto supply store and find the smallest filter I can find and build something to transition to my throttle body

Just did mine w the k&n . Now it sucks lil to much . Has a fp3 but stock pipes

I completed the piece with the screen as you did and couldn't be more pleased. Thanks for your idea.

Bought the parts for the transformation. We're going to do this also.

You guys better oil the hell out of those K&N filters , if not, you will have a much shorter engine life.

I like it. Nice job.

Friggin Awesome

That’s what we call thinking out of the box. Nicely done and like the look. I recently purchased a 2021 Ultra with the M8 114 and want to change the stock air filter to the H-D 1717 and keeping the stock mufflers without tuning for the stage one H-D doesn’t support that in California yet for the 2021 touring yet. So is the k&N replacement air filter considered a stage 1? Thank you.

Hey Rick, I gotta thank you for your creative Idea here, I also like the look of the Harley airbox and had full intention to purchase the Harley Kit. When I watched your video however It was so obvious . A friend had his old air box which he gave me and in about an hour had it to the epoxy setting stage. Its now on the bike with the K&N Filter looking good and running well. Thanks a lot. Safe riding !!

Great idea. I just fabricated one as well from a donner airbox for my 17 ultralimited. It came out great. Need to get the filter and tuner installed to see the difference but I love the way it looks.

Whoa...whoa...whoa there Rick...you can't just make a clever, highly engineered, high flow bitchin' air cleaner without a before and after dyno...measured dB before and after...fuel mileage before and after...and fun factor...all kidding aside...very well done.

great work, love the look. Question after doing the modification on that piece where you put the screen is that it can I just do the same thing slap it on and leave the bike alone or is there anything else that you Have to do like to make this work, like do you have to Auto-Tune the bike or anything I just want that look with the screen in place.