Screamin' Eagle Twin Cam Conversion Kit - 103CI to 110CI

    Part Number 92500031


    Finish / Color: Black Highlighted




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    Bring your Twin Cam motorcycle up to the same 110 cubic inch displacement and power output as the CVO™ Screamin' Eagle® models without expensive machining or removing the engine from the chassis. This street compliant kit combines the proven SE-255 cams and cylinder heads of the CVO™ model with exclusive Screamin' Eagle® bolt-on 4.0" cylinders and system-matched pistons to deliver high torque and reliable everyday performance.

    • Black highlighted
    • Automatic compression release-equipped cylinder heads and the flat top forged pistons combine to develop a 9.3:1 compression ratio for easy starting
    • Screamin' Eagle® lifters ensure quiet reliable valve train operation
    • Includes SE 4.0" bolt-on cylinders, CVO™ 110 cylinder heads, SE-255 cams, forged 9.3:1 compression pistons and rings, heavy duty clutch spring, top end and cam cover gaskets, and high-capacity roller tappets
    • Separate purchase of cam spacers is recommended and requires separate purchase of appropriate Automatic Compression Release Wiring Harness
    • All EFI-equipped models require dealer-installed ECM calibration download or use of 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

      SE 4.0" bolt-on cylinders, CVO 110 cylinder heads, SE-255 cams, forged 9.3:1 compression pistons and rings, heavy duty clutch spring, top end and cam cover gaskets, and high-capacity roller tappets
    • Sold Separately

      Click the Fitment tab above for details
    • Upgrade Stage Level

      Stage IV


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    Fits ’10-'16 Touring models (except ’14-'16 models with Twin-Cooled engines). Does not fit Trike models, CVO™ 110 models, or models with engine cases that have been machined to accept large bore cylinders. Requires separate purchase of Screamin’ Eagle® high-flow air cleaner. ’10 FLHX and FLTRX models require separate purchase of 2-into-2 Head Pipe Kit and Mufflers. ’11-'16 Touring models require installation of CVO™ Mufflers P/N 64768-09A and 64769-09A or FatShotz Muffler Kit P/N 80847-10 (sold separately). ’10-11 Touring models require ACR Harness P/N 70623-08. 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.


    Bolt-On 110 Cubic Inch Street Performance Kit is rated 5.0 out of 5 by 1.
    Rated 5 out of 5 by from Dealer Install was Excellent Since I already had Cams I already had the SE259 cams installed and exhaust work done so this was a no brainer when the kit came. Needed a little more "grunt" from the bike then what the 103 engine was providing. the 110 SE kit and a dyno made an enormous difference.
    Date published: 2015-11-09
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    Q & A

    Can a 585 cam be fitted in replacement of the 255 cam without additional parts (eg. Valve springs)?

    Looking to give my 103HO Street Glide Special (2015) an newlease of life and better power after 35k miles Shame this kit doesn’t also come with high compression pistons
    Asked by: TomJones74

    Would you please post a dyno sheet comparison of the stock 103 vs the 110 bolt on kit

    You provide those comparisons for the other stage kits. It would be very helpful in deciding to go ahead with the rather large investment.
    Asked by: franlou

    Engine size

    You aren't answering the question. He is asking will this kit work with a 96" engine. You keep answering with "2010 FLHR". Fine and dandy, but WILL THIS KIT WORK WITH A 2010 TOURING MODEL 96"? Please don't reply with "yes, it will fit a 2010 FLHR". That is not the question. Its a given that it will work with a 103", what about the 96" engine?
    Asked by: mccarterw

    will this kit affect the extened warranty on my bike

    I just traded my fat boy for a street glide I've put 3,000 miles on it. I have the extended warranty on the bike and have been told that this kit would void it.
    Asked by: swamprider
    What's up swamprider, Installation of street compliant Screamin’ Eagle products by an authorized Harley-Davidson dealer does not void any part of the H-D™ limited vehicle warranty. This also applies to the installation and use of the compliant Street Performance Tuner. The Street Tuner provides base calibrations that can be adjusted by the end-user for changes in intake, exhaust, riding conditions and to account for bike-to-bike variation. The adjustments are allowed within a safe and compliant range, which has been approved by the appropriate government agencies, therefore the vehicle retains the limited warranty. Modification of Harley-Davidson motorcycles with competition-use only components may void the manufacturer’s powertrain warranty. Installation and use of the Screamin’ Eagle Super Tuner voids the H-D limited manufacturer’s powertrain warranty due to the wide range of adjustability that can enable excessive rpm or improper tuning that can result in engine damage.
    Answered by: Rockstar883
    Date published: 2017-10-28

    can you order this kit and install higher compression pistons?

    the 9:3 compression is ok but 10:5 or 11 would be better.
    Asked by: abadtrucker
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