Finned Headbolt Bridge

    Part Number 43859-00


    Finish / Color: Black




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    This exclusive aluminum Finned Headbolt Bridge covers both headbolts and the spark plug, filling out your cylinder fins all the way to the rocker box.

    • Features an engraved Bar & Shield emblem
    • Easy to install with unique headbolt mounts
    • Sold in pairs
    • Includes all necessary mounting hardware


    • Material Content

    • Warranty

      1 year limited warranty – Go to for full details
    • Sold in Unit

    • In The Box

      All necessary mounting hardware


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    Fits '99-'17 Twin Cam-equipped models with electronic fuel injection and '00-later FXSTD models.

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    Finned Headbolt Bridge is rated 4.7 out of 5 by 28.
    Rated 5 out of 5 by from Totally Finished Look to Motor Bridge Looked great online so I thought I would splurge on the purchase. WOW - So worth the cost and gives the motor a very finished look by covering the motor bolts. Simple installation and high quality parts. I added the screaming eagle spark plug wires in orange and it really sets off a clean professional looking appearance. Highly recommended, you will not be disappointed.
    Date published: 2017-11-25
    Rated 4 out of 5 by from Quick easy stylish addition (beware the threadlocker) I really like the finished look it gives to my engine. Is really a pretty simple quick installation (in a perfect world). I docked 1 star because it would be nice if the instructions warned that the fasteners come with an epoxy like threadlocker on them. I sat in my livingroom and pre-threaded the plug screws and went out to my bike to install the bridges. Started to attempt to tighten the screws and found out they were already locking in place. I destroyed one allen wrench trying to back them out. I finally got them out and cleaned up and the installation finished. So what should have taken 15 mins max turned into about a hour.
    Date published: 2017-09-01
    Rated 5 out of 5 by from Makes the Engine Top End look Amazing!!! This just makes the engine have a more finished look! I have put these on every Harley I have owned because of the way they look! Great product!!! They are also very easy to install, maybe 15-20 minutes taking your time; directions are perfect. And boy how happy you will be with them on!!
    Date published: 2017-08-12
    Rated 5 out of 5 by from Spark plug covers These are easily installed and adds a little extra heat to dissipate from the engine. Mostly it add accent to the engine to make it look more complete.
    Date published: 2017-07-14
    • y_2018, m_2, d_26, h_20
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    • clientName_harleydavidson

    Q & A

    Why this fits 15' FLHTKSE but not fits 15' FLHXSE? They engines are the same!

    Asked by: cdemczuk

    Once installed is there a heat build up that would be bad for the heads& spark plugs?

    Asked by: Harleyrider50
    Hello Harleyrider50, You do not need to worry about excessive heat build up from installing the covers. Thank You!
    Answered by: JD34
    Date published: 2015-04-15

    Diamond Cut Edge?

    Does these match up with the diamond cut edge on a stock 09 Ultra Classic?
    Asked by: Curl58
    Hey Curl58, Yes, this Finned Headbolt bridge will match the engine finish on your 2009 Ultra Classic.
    Answered by: Wisco832
    Date published: 2014-06-25
    • y_2018, m_2, d_26, h_20CST
    • bvseo_bulk, prod_bvqa, vn_bulk_2.0.7
    • cp_1, bvpage1
    • co_hasquestionsanswers, tq_3
    • loc_en_US, sid_PA-04-4385900, prod, sort_[SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
    • clientName_harleydavidson

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