Screamin' Eagle 10mm Phat Spark Plug Wires

Part Number 31963-89B


Finish / Color: Orange



Fat 10mm plug wires add dimension and style to your ride. Screamin' Eagle® boot design and suppression core wires ensure solid connection and maximum voltage transfer between coil and plugs.

  • Orange 10mm wire
  • Screamin' Eagle® graphic printed along wire

Fits ’86-’03 XL models (except XL1200S).

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  • Model
  • Warranty

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

  • In The Box

    2 spark plug cables
10mm Phat Spark Plug Wires is rated 5.0 out of 5 by 5.
Rated 5 out of 5 by from Beefy noticeable wires Picked up a 2002 883R in orange and black and damaged a plug wire while going through the thing. Luckily had these already on order. Wires are wires, I suppose; however, these are noticeably beefy in appearance and really stand out on an orange bike with a black powder coat engine. Install these with the Screaming Eagle spark plugs for better responsiveness and firing.
Date published: 2016-04-02
Rated 5 out of 5 by from Screaming eagle plug wires These wires look an fit great... Upon installation of these wires I also replaced the plugs with Screaming eagle as well... My sporty starts much easier,runs smoother an stronger with power you can feel because of more spark an even conducting
Date published: 2015-04-07
Rated 5 out of 5 by from Made to Last!! A must have for any HD owner!! Great Looks!!! Awesome performance!!!
Date published: 2015-03-18
Rated 5 out of 5 by from SCREAMING EAGLE PLUG WIRES. LOOK GREAT, EASY INSTALL and MY BIKE IS FIRING OVER MUCH QUICKER WITH THE HEAVIER GUAGE WIRES. Only wish they had come with the Cable Ties also to match the original ones that were on my bike. I could not find the OEM ones to purchase.
Date published: 2015-02-16
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  • clientName_harleydavidson

Should I order 2 for the Sportster Sport? (2 plugs per cylinder)

Does the kit include cables for one cylinder only?
Asked by: SLmanDR
Hello SLmanDR, These spark plug wires will not work for your application. The connectors are different from what you have and the wires for the center plug has extra insulation on them to protect from the additional heat they see. These wires do not have that feature. Thank you!
Answered by: JD34
Date published: 2015-01-27
  • y_2018, m_2, d_26, h_20CST
  • bvseo_bulk, prod_bvqa, vn_bulk_2.0.7
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    Prices listed are generally the Manufacturer's Suggested Retail Price (MSRP), excluding taxes and shipping. Prices at local dealerships may vary. All online orders will be fulfilled and shipped by
    Harley-Davidson Motor Company as the agent for the Selling Dealer.