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Finned Headbolt Bridge - PN 438547

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Old Jan 31, 2009 | 04:26 PM
  #1  
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Default Finned Headbolt Bridge - PN 438547

I bought some of these today for my 2008 Electra Glide Standard.

http://www.harley-davidson.com/gma/g...bmLocale=en_US

In talking with the service manager about them I asked if they would increase engine heat. I was half joking. To my surprise he said yes. He said that with an Ultra Classic with the lowers they don't recommend putting them on because of the extra heat. He said for any other bike without the lowers it's not a problem. I thought how much extra heat could these cause. If anyone has these is this a concern of yours? Thanks for any opinions or input.
 

Last edited by ajay450; Jan 31, 2009 at 04:59 PM.
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Old Jan 31, 2009 | 04:40 PM
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I got them on my 08 Ultra, they look nice. Don't know about a heat problems.
 
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Old Jan 31, 2009 | 04:41 PM
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Dang, I was about to put a set of those on my bike too. I don't like the way it looks with the sparkplug sitting there, and I wanted to fill in that gap.
 
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Old Jan 31, 2009 | 04:50 PM
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Got them on both wife's and mine
Never noticed heat problems you'd think
they 'd work like a heat sink and pull the
heat away.
 
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Old Jan 31, 2009 | 04:58 PM
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The service manager was referring to them blocking cooling air from flowing into that area around the plug. I didn't think there was much to what he said. The parts guy was there when he told me and thought it was a bit of an overstatement.

I think they look outstanding on the bike.

Thanks for your replies.
 
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Old Jan 31, 2009 | 08:40 PM
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I have them. One of the first things I did. You don't notice what a difference they make until after you have them. It's one of those small details. I have never had any heat issues with them.
 
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Old Jan 31, 2009 | 09:03 PM
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If anything, they aid cooling as a "heat sink" by adding more cooling surface and fins.
 
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Old Jan 31, 2009 | 09:11 PM
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Originally Posted by Dionicio
I got them on my 08 Ultra, they look nice. Don't know about a heat problems.
Sounds good, now I wont worry about mine.
 

Last edited by Dionicio; Jan 31, 2009 at 09:20 PM.
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Old Jan 31, 2009 | 09:13 PM
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I have them on my Street Glide and have soft lowers and have not noticed a difference and they sure look cool.
 
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Old Jan 31, 2009 | 09:22 PM
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Do you also think, that with the vented lowers, if they were open, it would act the same as a bike with no lowers? I mean, the vent blows air across my legs, and my legs are in that area.

After my shorty antennas, I plan on getting some. I think they clean up the engine tremendously.
 
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