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

Part Number 92500011


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 96 hp and 105 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

Fits '16-'17 Softail® (except FLSS, FLSTFBS and FXSE) and '10-'16 Touring models (except '14-'16 models with Twin-Cooled™ engines) equipped with a Twin Cam 103™ engine. Fits 49-state '10-'11 Touring models equipped with a Twin Cam 96™ engine with separate purchase of Screamin' Eagle® 3-7/8" Big Bore Cylinder Kit. '10 FLHX and FLTRX requires dual exhaust. 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. '17 models require recalibration with Screamin' Eagle® Pro Street Tuner (sold separately).

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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.


Installation of automatic or manual compression releases on large displacement engines is highly recommended.

  • 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 4.6 out of 5 by 15.
Rated 5 out of 5 by from My dyno on my Stage 4 kit My Road Glide Custom 2012 103 Stage 4 kit Vance & Hines Powerduals with Thunderhear slipons TTS MasterTune 106Hp 112Tq very happy
Date published: 2017-09-27
Rated 5 out of 5 by from great all around performance I added this kit love the way it rides only difference is I went with the 585 cams. You will need a decent tuner and 2:1 pipe as well! really wakes up the 1000# dresser
Date published: 2017-07-17
Rated 5 out of 5 by from 2012 FLHTCU I had the kit installed about 4 yrs ago and haven't regretted one minute of it. I have the Vance & Hines 2 into 1 pipes for around 112 decibles. I'm heard and felt. Kicks out 108 hp and 110 torq. Did put on a set of J&P Mother Jugs cooling fans for idle & low speeds in traffic. Does get hot in the DFW area at times.
Date published: 2017-04-21
Rated 5 out of 5 by from Stage IV in 2012 FLHTK After test riding a new Milwaukee 8 bike, the only thing wrong with my FLHTK 2012 bike was I rode the new, very high torque Milwaukee 8. After having the 103 Stage IV kit installed and Dyno tuned using a Screamin Eagle Performance Tuner, I got 107.4 HP max and 110 ft-lbs Torque. I have Vance & Hines Power Duals with Monster Oval pipes and a Screamin Eagle 58mm Air box. The bike now feels great, power is always there to be tapped into in all gears and at all speeds. I am very pleased. Can't wait to ride the Dragon again. Thank you Redstone Harley Davidson!
Date published: 2016-09-23
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Can this be installed on a stock 103 engine without any of the preceding stage upgrades?
Asked by: Jonny915

what all do i need to buy to install this kit as in additional parts and gaskets

this will be put in a 2016 street glide. I have been trying to find out if this can be installed without adding a tuner and dyno tuning . can this be recalibrated at a Harley dealer without having to dyno tune. I am not looking to push to max horse dyno tuning.
Asked by: eagle08

Rough idle

I have the stage IV on my 2013 FLHTK and the idle is rough, also at low rpm and just a few throttle. Do I have to retune or does it come from the camshaft and there is nothing to do ?
Asked by: Pascal

Best muffler to fit with this kit

What would be the best muffler to fit a '13 Anniversary FLHTK, with a SE air cleaner for 58 mm throttle body under OEM cover and this stage IV kit ? Thanks, regards, Pascal.
Asked by: Pascal
I have tried the true duals, slip-on and wound up with best dyno results by using the Vance n Hine 2 in to one pro pipe with performance baffle. stock baffles blew apart 4 different times. Don't even both with them.
Answered by: Bob1221
Date published: 2017-09-16

Approximately how many man / labor hours does it take to install the SE street performance Bg Bore Stage IV kit on a stock 2015 FLHXS?

Asked by: jackdrisc
I had my Stage IV Kit installed February of 2015. The Stage IV engine break down and build up was 8 hours of labor. The DYNO Tune to get everything right was 3 hours of labor. Depending on the technician, prepare for at least 10 hours of labor. This also included some items not included in the kit such as the upgraded cam plate and hi flow oil pump. When you decide to make this jump, get everything you want in the engine to keep cost down. Some dealerships will compromise on labor rates when other items are purchased and are part of the original build. Good luck. Thunderbird HD in NM works with their customers to build the bike of their dreams. Great Shop!!!
Answered by: Ponser
Date published: 2016-04-09
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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
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