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

Part Number 92500019


Finish / Color: Black Highlighted



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

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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  • Model
  • These Screamin' Eagle® products are 50-State U.S. EPA compliant for sale and use on all applicable vehicles, including those that are pollution controlled. See Genuine Motor Parts and Accessories or Screamin' Eagle Accessories catalog for fitment information. Screamin' Eagle Performance products are intended for the experienced rider only.
  • 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
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
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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
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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.