2024+ Center-Cooled Touring Models 2023.5+ CVO and 2024+ Road Glide/Street Glide/Street Glide Ultra Center-Cooled Gen 2 M8 Touring models

2024 SE High Flow air filter vs Stock

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Old Jun 13, 2024 | 10:50 AM
  #11  
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So I tied the ribbon on the tune..

I had to order the 117 Stage 1 timer medallion and it came in yesterday. I installed it along with the air intake trim that was included with the SE air filter. So now I'm officially Stage I




 
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Old Jun 15, 2024 | 04:32 PM
  #12  
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Not to highjack your thread, but I'm just curious though... on the 24's with the 117, does the hose on the transmission cover vent into the breather and did they get rid of the breather bolts from the heads into the breather? I was looking at them today and I believe the answer to both is yes... that the engine venting is now done thru the transmission cover (similar to the VVT motor).
 
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Old Jun 15, 2024 | 05:20 PM
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Originally Posted by Ssitruc
Not to highjack your thread, but I'm just curious though... on the 24's with the 117, does the hose on the transmission cover vent into the breather and did they get rid of the breather bolts from the heads into the breather? I was looking at them today and I believe the answer to both is yes... that the engine venting is now done thru the transmission cover (similar to the VVT motor).
Yes and Yes.

Before I replaced the OEM AC, I actually removed the OEM hose from the top cover and the rear of the AC. With a new length of vacuum hose, I attached it to the top cover and connected it to a DK catch can. I simply plugged the fitting behind the AC with a cap plug.
 
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Old Jun 15, 2024 | 05:59 PM
  #14  
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As Erratikmind points out, The breather bolts are no longer used. I haven’t done any mods to the breather system on my bike. I had over 3000 miles on the odo when I installed the new filter. There was no oil anywhere in the intake. Not even from misting. . The butterfly was dry as a bone.. I couldn’t say that about my 22 Road King.
 
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Old Mar 27, 2026 | 05:45 PM
  #15  
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How did you get the spacer out of the stock air filter to put it on the new SE air filter??? I can't get my spacer to move!! Thank You!
 
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Old Mar 28, 2026 | 06:51 AM
  #16  
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Originally Posted by srms411
Just curious. Does a filter element change require a tune AKA Stage 1 program to the ECM ?
Yes. Replacing the stock A/C filter with this one is considered a Stage I upgrade and the bike should be tuned.
 
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Old Mar 28, 2026 | 06:55 AM
  #17  
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Originally Posted by HDRG2024
How did you get the spacer out of the stock air filter to put it on the new SE air filter??? I can't get my spacer to move!! Thank You!
I had to take a pliers to mine and twist and pull for a quiet a while to work it out.
 
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Old Mar 28, 2026 | 08:15 AM
  #18  
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To the OP, just recently on my 25 road glide, I also installed slip-ons along with the same SE air filter and medaliions, as well as the SE tuner. Although my primary purpose for the Stage I is the better air/fuel ratio, my butt dyno tells me I also got a performance boost. Next step for me is to try the smart-tune session to replace the canned HD tune.

Originally Posted by HDRG2024
How did you get the spacer out of the stock air filter to put it on the new SE air filter??? I can't get my spacer to move!! Thank You!
Yeah, that sucker is TIGHT! I gently held the air filter in a vice and knocked it out with a dowel.
 
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Old Mar 28, 2026 | 12:27 PM
  #19  
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The SE replacement filter in the stock 117 air box was tested by @Steve Cole : "In testing that replacement element showed no gain or no loss from a clean stock element."
 

Last edited by Hulkss; Mar 28, 2026 at 12:30 PM.
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Old Mar 29, 2026 | 11:16 AM
  #20  
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Default Stock HOT box

Originally Posted by Hulkss
The SE replacement filter in the stock 117 air box was tested by @Steve Cole : "In testing that replacement element showed no gain or no loss from a clean stock element."
Ditto what Hulkss said about Steve Cole’s test.

I call the Stock box truly what it is , a Hot Box. It’s designed to keep noise down, not airflow!

Toss the stock box if you can, and get a improved A/C your bike can grow with.

 
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