Screamin' Eagle Twin Cam Stage IV Kit - 103CI to 103CI

    Part Number 92500019


    Finish / Color: Black Highlighted




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    This Street Performance kit provides the maximum horsepower output for a legal 103 kit that will maintain the factory warranty.

    • Black highlighted
    • Includes forged 10.5:1 high compression pistons and rings, SE 58mm throttle body, SE CNC ported cylinder heads, SE-259 cams, perfect-fit pushrods, top end gasket kit, and heavy duty clutch spring
    • Street Performance kit produces 93 hp and 100 lbs-ft of torque
    • All EFI-equipped models require dealer installed ECM calibration download or use of the tunable Screamin' Eagle® Street Tuner Kit (priced separately)
    • Recalibration is required for proper installation, See Dealer for details, Labor cost not included
    • When installed by an authorized Harley-Davidson® Dealer at the time of vehicle delivery, these kits do not impact the vehicle's limited warranty


    • Dealer Install Recommended

    • Warranty

      1 year limited warranty – Go to for full details
    • Requires ECM Calibration

    • Sold in Unit

    • In The Box

      Forged 10.5:1 high compression pistons and rings, SE 58mm throttle body, SE CNC ported cylinder heads, SE-259 cams, perfect-fit pushrods, top end gasket kit, and heavy duty clutch spring
    • Sold Separately

      Contact your local dealer for details
    • Upgrade Stage Level

      Stage IV


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    Fits '14-'16 FLHTCU, FLHTCUL, FLHTK and FLHTKL models with Twin-Cooled engines. Does not fit Trike models. Installation requires separate purchase of Primary Cover Gasket. Cam Drive Retention Kit P/N 25566-06. Cam Spacer Kit P/N 25928-06 is recommended. All models require ECM calibration for proper installation.

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    More Info

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    • These Screamin' Eagle® products are 50-state street-legal for sale and use on all vehicles, including those that are pollution controlled. Complies with the requirements of 40 CFR Part 86, subparts E and F.


    Street Performance Big Bore Stage IV Kit - 103 Cubic Inches is rated 5.0 out of 5 by 1.
    Rated 5 out of 5 by from Top Performance Limited This system works very well and out performed the advertised stats and over 5000 ft elevation. The bike keeps building power after 3500 rpm and over 5000 rpm. I love the upgrade and now looking for something similar for my wife's trike. My MPG is going to be higher too. I did the stage IV with an air cleaner and the SE high flow exhaust. AWESOME MACHINE!
    Date published: 2014-02-26
    • y_2018, m_2, d_26, h_20
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    • clientName_harleydavidson

    Q & A

    do you i have to change air cleaner and exhaust on a 2016 flhtk to have this kit installed

    Asked by: Carnivore

    Can this kit be installed on a 2007 FXSTCI with a 96CI Fuel Injected engine?

    I've seen Stage I and Stage II kits that allow a 96CI engine to be taken up to 103CI. Will this Stage IV kit work on my 2007 FXSTCI engine?
    Asked by: Adidas57
    Hi Adidas57, No, the Screamin' Eagle Street Performance Big Bore Stage IV will not work for your 2007 FXSTCI. Please see an authorized H-D for assistance. Thanks!
    Answered by: RowdyGrl79
    Date published: 2016-08-30

    I like to upgrade stage 4 kit

    i like to upgrade to stage 4 kit on my 2014 trike it has 103 with liquid cooled heads it said will not fit. My question why will not work
    Asked by: John2014
    Hello John2014, This part# has not been validated for performance with Trike models. Thank you for your question.
    Answered by: Iceman25
    Date published: 2015-10-13

    I am thinking putting a 58mm throttlebody on my 2012 flhtk can I have cruise control

    I have a 2012 harley-davidson flhtk if i put a 58mm throttllebody will i be able to hookup the cruisecontrol
    Asked by: drive472
    Hello Drive472, Yes, you will still be able to have cruise control with the 58mm throttle body. Thank You!
    Answered by: JD34
    Date published: 2015-03-24

    Do the heads for this kit come pre-drilled for compression releases?

    Asked by: Paddy1550
    • y_2018, m_2, d_26, h_20CST
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    • clientName_harleydavidson

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