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H-D® SE Performance Kits

Pump up the torque and horsepower of your Harley-Davidson® motorcycle with street-legal Screamin' Eagle® EFI Stage Kits. They contain everything you need to enhance your bike's performance, including big-bore cylinders, high-compression pistons, performance cams, and high-flow air cleaners.

1 - 20 of 34
  • £ 2,815.39
    £ 2,815.39

    This Stage IV Kit was developed to deliver maximum horsepower from the Milwaukee-Eight engine - all the way to the redline. The system-matched combination of larger displacement cylinders, free flowing CNC-Ported cylinder heads and a cam with the highest available valve lift are the starting point to building the perfect engine for the performance junkie. The addition of the large 64mm bore throttle body and high-flow injectors provides great acceleration from first gear through sixth and exceptional response at the twist of the throttle. Designed for a high level of flexibility, this package is ideal for riders who want stump pulling torque throughout the rpm range and also crave plenty of arm-pulling acceleration when you whack the throttle. Kit includes CNC Ported Cylinder Heads with Performance Valve Springs, 64mm Throttle Body, High Flow Injectors (5.5g/s), 4.075" Bolt-On Cylinders, Forged 11:1 High Compression Aluminum Coated Pistons and Rings, SE8-515 Cam, Cam Bearing Upgrade, High Performance Tappets, Multi-layer Coated Head Gaskets and most necessary gaskets and seals. For’17 and ’18 Touring models, installation of oil pump cover P/N 62400206 is recommended (sold separately). All models require ECM calibration with Screamin’ Eagle® Pro Street Tuner for proper installation. See Dealer for details. Pending approval for use in California on '19 models. Refer to the product information at www.H-D.com/shop for status

    • Stage IV Kit 114CI to 117CI or 117CI to 117CI - Twin-Cooled
    • Black Highlighted
    • Increases power by up to 40% when compared to the Original Equipment engine configurations
    • Delivers increased response throughout the entire RPM range
    • Maintains flat torque curve from cruising RPM to redline
    • Can be installed without removing the engine from the chassis
    • Retains Original Equipment Factory Warranty
    • Pending Regulatory approval for '19-later models
  • £ 466.30
    £ 466.30

    This kit was developed for the budget minded rider that wants to experience that adrenalin-pumping burst of speed while heading toward the red line. The additional power starts to build @ 3000 RPM and continues to build by up to 24% at redline. Riding the bike aggressively will require downshifting to lower gears to keep the engine operating in the higher RPM range.

    • Ideal for riders looking for excitement and are willing to ride in the upper RPM range
    • Produces greater acceleration in the mid and upper RPM range
    • Minimally invasive only requiring opening of the cam chest
    • Retains Original Equipment Factory Warranty
    • Includes Gloss Black covers
    • Stage II Upgrade
    • 50-State U.S. EPA compliant
  • £ 466.30
    £ 466.30

    This kit was developed for the budget minded rider that wants to experience crisp throttle response and acceleration they can feel at slower speeds. The 5% increase in torque can be felt immediately off the line and continues to build by up to a 14% increase @ 4500 RPM – the ideal power band for passing slow moving vehicles.

    • Delivers enhanced torque and horsepower in the low to mid RPM range
    • Produces passing power without a downshift or high revs
    • Minimally invasive only requiring opening of the cam chest
    • Retains Original Equipment Factory Warranty
    • Includes Gloss Black covers
    • Stage II Upgrade
    • 50-State U.S. EPA compliant
    • Screamin’ Eagle Performance upgrades for FLSB are 49-state U.S. EPA approved, Pending approval for use on '18 Softail FLSB in California
  • £ 1,730.86
    £ 1,730.86

    This kit was developed for the rider looking for a solid seat of the pants increase you can feel – every time you roll on the throttle. The increase in displacement and the bump in compression deliver a significant increase in torque and power over stock while restoring the sensation of riding solo when taking that long trip with a passenger and luggage. The Stage III 107 to 114 upgrade delivers up to 39% more power and the 114 to 117 upgrade increases power by up to 24% when compared to the Original Equipment engine configurations.

    • Black Non-Highlighted
    • The Stage III 114 to 117 upgrade increases power by up to 24% more power and the 114 to 117 upgrade increases power by up to 24% when compared to the Original Equipment engine configurations
    • Delivers increased throttle response throughout the entire RPM range
    • Produces flexible roll-on passing power without a required downshift
    • Delivers excellent stop-light to freeway speed on-ramp acceleration
    • Retains Original Equipment Factory Warranty
    • Includes Screamin' Eagle Cylinders, Pistons, Piston Rings, Cam, Valve Springs, Tappets, Head Gaskets, Cylinder Base and Cam Cover Gaskets, and Clutch Springs
    • 50-State U.S. EPA compliant
  • £ 1,730.86
    £ 1,730.86

    This kit was developed for the rider looking for a solid seat of the pants increase you can feel – every time you roll on the throttle. The increase in displacement and the bump in compression deliver a significant increase in torque and power over stock while restoring the sensation of riding solo when taking that long trip with a passenger and luggage.

    • Black Non-Highlighted
    • The Stage III 107 to 114 upgrade delivers up to 39% more power and the 114 to 117 upgrade increases power by up to 24% when compared to the Original Equipment engine configurations
    • Delivers increased throttle response throughout the entire RPM range
    • Produces flexible roll-on passing power without a required downshift
    • Delivers excellent stop-light to freeway speed on-ramp acceleration
    • Retains Original Equipment Factory Warranty
    • Includes Screamin' Eagle Cylinders, Pistons, Piston Rings, Cam, Valve Springs, Tappets, Head Gaskets, Cylinder Base and Cam Cover Gaskets, and Clutch Springs
    • 50-State U.S. EPA compliant
  • £ 2,815.39
    £ 2,815.39

    This Stage IV Kit was developed to deliver maximum horsepower from the Milwaukee-Eight® engine - all the way to the redline. The system-matched combination of larger displacement cylinders, free flowing CNC-Ported cylinder heads and a cam with the highest available valve lift are the starting point to building the perfect engine for the performance junkie. The addition of the large 64mm bore throttle body and high-flow injectors provides great acceleration from first gear through sixth and exceptional response at the twist of the throttle. Designed for a high level of flexibility, this package is ideal for riders who want stump pulling torque throughout the rpm range and also crave plenty of arm-pulling acceleration when you whack the throttle. Kit includes CNC Ported Cylinder Heads with Performance Valve Springs, 64mm Throttle Body, High Flow Injectors (5.5g/s), 4.075" Bolt-On Cylinders, Forged 11:1 High Compression Aluminum Coated Pistons and Rings, SE8-515 Cam, Cam Bearing Upgrade, High Performance Tappets, Multi-layer Coated Head Gaskets, Top End, Cylinder Base and Cam Cover Gaskets, High Capacity Clutch Springs and Plates.

    • Black granite highlighted
    • Increases power by up to 40% when compared to the Original Equipment engine configurations
    • Provides thrilling acceleration when twisting the throttle
    • Delivers increased response throughout the entire RPM range
    • Maintains flat torque curve from cruising RPM to redline
    • Can be installed without removing the engine from the chassis
    • Retains Original Equipment Factory Warranty
    • 50-State U.S. EPA compliant
  • £ 2,815.39
    £ 2,815.39

    This Stage IV Kit was developed to deliver maximum horsepower from the Milwaukee-Eight® engine - all the way to the redline. The system-matched combination of larger displacement cylinders, free flowing CNC-Ported cylinder heads and a cam with the highest available valve lift are the starting point to building the perfect engine for the performance junkie. Designed for a high level of flexibility, this package is ideal for riders who like to comfortably cruise at lower rpm but still have plenty of arm-pulling acceleration when you whack the throttle. Kit includes CNC Ported Cylinder Heads with Performance Valve Springs, 64mm Throttle Body, High Flow Injectors (5.5g/s), 4.075" Bolt-On Cylinders, Forged 11:1 High Compression Aluminum Coated Pistons and Rings, SE8-515 Cam, Cam Bearing Upgrade, High Performance Tappets, Multi-layer Coated Head Gaskets, Top End, Cylinder Base and Cam Cover Gaskets, High Capacity Clutch Springs and Plates.

    • Black highlighted
    • Delivers up to 52% more power when compared to the Original Equipment engine configurations
    • Provides thrilling acceleration when twisting the throttle
    • Delivers increased response throughout the entire RPM range
    • Maintains flat torque curve from cruising RPM to redline
    • Can be installed without removing the engine from the chassis
    • Retains Original Equipment Factory Warranty
    • 50-State U.S. EPA compliant
  • £ 2,815.39
    £ 2,815.39

    This Stage IV Kit was developed to deliver maximum horsepower from the Milwaukee-Eight® engine - all the way to the redline. The system-matched combination of larger displacement cylinders, free flowing CNC-Ported cylinder heads and a cam with the highest available valve lift are the starting point to building the perfect engine for the performance junkie. The addition of the large 64mm bore throttle body and high-flow injectors provides great acceleration from first gear through sixth and exceptional response at the twist of the throttle. Designed for a high level of flexibility, this package is ideal for riders who want stump pulling torque throughout the rpm range and also crave plenty of arm-pulling acceleration when you whack the throttle. Kit includes CNC Ported Cylinder Heads with Performance Valve Springs, 64mm Throttle Body, High Flow Injectors (5.5g/s), 4.075" Bolt-On Cylinders, Forged 11:1 High Compression Aluminum Coated Pistons and Rings, SE8-515 Cam, Cam Bearing Upgrade, High Performance Tappets, Multi-layer Coated Head Gaskets, Top End, Cylinder Base and Cam Cover Gaskets, High Capacity Clutch Springs and Plates.

    • Black highlighted
    • Delivers up to 52% more power when compared to the Original Equipment engine configurations
    • Provides thrilling acceleration when twisting the throttle
    • Delivers increased response throughout the entire RPM range
    • Maintains flat torque curve from cruising RPM to redline
    • Can be installed without removing the engine from the chassis
    • Retains Original Equipment Factory Warranty
    • 50-State U.S. EPA compliant
  • £ 2,273.12
    £ 2,273.12

    Turn your Original Equipment 110 cubic inch model into a fast, reliable 117 cubic inch Twin Cam hauler without having to remove the motor from the chassis. This Street Performance Kit combines system-matched Screamin’ Eagle big bore cylinders, forged pistons and performance cams and valve train components with the Original Equipment cylinder heads for a cost-effective boost in torque and performance.

    • Black finish
    • Exclusive bolt-on 4.125" cylinders are engineered with high strength slim-wall spigots that slip into the factory 110CI crank case without any additional machining
    • 4.125" flat top pistons team with the stock cylinder heads to produce a performance-enhancing 9.9:1 compression ratio
    • High-lift SE-259E cam produces a boost in torque throughout the RPM range
    • 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
    • Includes 4.125" Bolt-On Cylinders, Forged 9.9:1 Compression Pistons & Rings, 58mm Throttle Body, High Flow Fuel Injectors, SE-259E Cams, Perfect-Fit Pushrods, High-Capacity Roller Tappets, Inner Cam Bearing, Top End & Cam Cover Gasket, EO Emissions Label
  • £ 2,273.12
    £ 2,273.12

    Turn your Original Equipment 110 cubic inch model into a fast, reliable 117 cubic inch Twin Cam hauler without having to remove the motor from the chassis. This Street Performance Kit combines system-matched Screamin’ Eagle big bore cylinders, forged pistons and performance cams and valve train components with the Original Equipment cylinder heads for a cost-effective boost in torque and performance.

    • Granite Finish
    • Exclusive bolt-on 4.125" cylinders are engineered with high strength slim-wall spigots that slip into the factory 110CI crank case without any additional machining
    • 4.125" flat top pistons team with the stock cylinder heads to produce a performance-enhancing 9.9:1 compression ratio
    • High-lift SE-259E cam produces a boost in torque throughout the RPM range
    • 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
    • Includes 4.125" Bolt-On Cylinders, Forged 9.9:1 Compression Pistons & Rings, 58mm Throttle Body, High Flow Fuel Injectors, SE-259E Cams, Perfect-Fit Pushrods, High-Capacity Roller Tappets, Inner Cam Bearing, Top End & Cam Cover Gasket, EO Emissions Label
  • £ 1,030.25
    £ 1,030.25

    The Stage II Big Bore Kit provides the parts you need to increase the horsepower of your EFI-equipped model. The kit increases the displacement of your Twin Cam-equipped model from 96 cubic inches (1584cc) to 103 cubic inches (1690cc).

    • Black Highlighted
    • Includes big bore cylinders, big bore flat top pistons and rings, SE-255 cams, stage I air cleaner kit with one-piece back plate, top end gasket kit, and heavy duty clutch spring
    • Separate purchase of cam spacers is recommended
    • Requires separate purchase of primary cover gasket
    • All EFI-equipped models require dealer-installed ECM calibration download or use of tunable Screamin' Eagle® Street Tuner Kit (priced separately)
    • California kits are street compliant on California pollution controlled vehicles when used with Original equipment mufflers
    • 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
  • £ 433.75
    £ 433.75

    This kit was developed for the budget minded rider that wants to experience that adrenalin-pumping burst of speed while heading toward the red line. The additional power starts to build @ 3000 RPM and continues to build by up to 24% at redline. Riding the bike aggressively will require downshifting to lower gears to keep the engine operating in the higher RPM range.

    • Ideal for riders looking for excitement and are willing to ride in the upper RPM range
    • Produces greater acceleration in the mid and upper RPM range
    • Minimally invasive only requiring opening of the cam chest
    • Retains Original Equipment Factory Warranty
    • 50-State U.S. EPA compliant
  • £ 1,730.86
    £ 1,730.86

    This kit was developed for the rider looking for a solid “seat of the pants” increase you can feel – every time you roll on the throttle. The increase in displacement and the bump in compression deliver a significant increase in torque and power over stock while restoring the sensation of riding solo when taking that long trip with a passenger and luggage.

    • Increases power by up to 24% when compared to the Original Equipment engine configuration
    • Delivers increased throttle response throughout the entire RPM range
    • Produces flexible roll-on passing power without a required downshift
    • Delivers excellent stop-light to freeway speed on-ramp acceleration
    • Retains Original Equipment Factory Warranty
    • 50-State U.S. EPA compliant
    • Includes 4.075" Bolt-On Cylinders, Forged 11:1 High Compression Pistons, High performance Piston Rings and Tappets, SE8-498 Cam, Performance Valve Springs, Multi-layer coated Head Gaskets, Cylinder Base & Cam Cover Gaskets, High-Capacity Clutch Spring
  • £ 1,730.86
    £ 1,730.86

    This kit was developed for the rider looking for a solid “seat of the pants” increase you can feel – every time you roll on the throttle. The increase in displacement and the bump in compression deliver a significant increase in torque and power over stock while restoring the sensation of riding solo when taking that long trip with a passenger and luggage.

    • Delivers up to 39% more power when compared to the Original Equipment engine configuration
    • Delivers increased throttle response throughout the entire RPM range
    • Produces flexible roll-on passing power without a required downshift
    • Delivers excellent stop-light to freeway speed on-ramp acceleration
    • Retains Original Equipment Factory Warranty
    • 50-State U.S. EPA compliant
    • Includes 4.075" Bolt-On Cylinders, Forged 11:1 High Compression Pistons, High performance Piston Rings and Tappets, SE8-498 Cam, Performance Valve Springs, Multi-layer coated Head Gaskets, Cylinder Base & Cam Cover Gaskets, High-Capacity Clutch Spring
  • £ 433.75
    £ 433.75

    This kit was developed for the budget minded rider that wants to experience crisp throttle response and acceleration they can feel at slower speeds. The 5% increase in torque can be felt immediately off the line and continues to build by up to a 14% increase @ 4500 RPM – the ideal power band for passing slow moving vehicles.

    • Delivers enhanced torque and horsepower in the low to mid RPM range
    • Produces passing power without a downshift or high revs
    • Minimally invasive only requiring opening of the cam chest
    • Retains Original Equipment Factory Warranty
    • 50-State U.S. EPA compliant
  • £ 2,342.54
    £ 2,342.54

    Maximize the horsepower and torque available for your street-compliant Sportster® model. This complete engine package includes all the components you need to build a high-performance ride while still retaining the original factory warranty.

    • Black Non-Highlighted Heads
    • Installation of this Stage IV Street Performance Kit does not require removal of the powertrain from the chassis
    • Includes CNC-ported cylinder heads with performance valve springs, SE XL SE-585 cams, forged hi-compression 10.5:1 pistons and rings, 58mm throttle body and intake manifold, and top end gasket kit
    • All EFI-equipped models require dealer-installed ECM calibration download or use of 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
  • £ 2,342.54
    £ 2,342.54

    Maximize the horsepower and torque available for your street-compliant Sportster® model. This complete engine package includes all the components you need to build a high-performance ride while still retaining the original factory warranty.

    • Black Highlighted Heads
    • Installation of this Stage IV Street Performance Kit does not require removal of the powertrain from the chassis
    • Includes CNC-ported cylinder heads with performance valve springs, SE XL SE-585 cams, forged hi-compression 10.5:1 pistons and rings, 58mm throttle body and intake manifold, and top end gasket kit
    • All EFI-equipped models require dealer-installed ECM calibration download or use of 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
  • £ 2,873.96
    £ 2,873.96

    This comprehensive kit provides a complete package of matched components that allow you to build a high performance 110ci Twin Cam without voiding the factory warranty. The unique Screamin' Eagle® 4.0" big bore cylinders are engineered to slip into the engine cases without case machining or modification, so the engine stays in the chassis during the build.

    • Includes 4.0" cylinders, SE CNC-Ported Cylinder Heads, matching 10.2:1 forged high compression pistons and rings, SE-259 cams, perfect-fit pushrods, high-capacity roller tappets, cam cover gaskets, heavy duty clutch spring, high flow fuel injectors
    • Also includes the SE 58mm Throttle Body with high flow fuel injectors
    • 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
    • Separate purchase of cam spacers is recommended
    • Requires separate purchase of accessory 58mm air cleaner and Cam Drive Retention Kit P/N 25566-06
    • When installed by an authorized Harley-Davidson® Dealer at the time of vehicle delivery, these kits do not impact the vehicle's limited warranty
  • £ 2,006.34
    £ 2,006.34

    Build a fast, reliable 110 cubic inch Twin Cam hauler without having to remove the motor from the chassis. This Stage III Street Performance Kit combines system-matched Screamin' Eagle® big bore cylinders, high compression pistons and performance cams and valve train components with the Original Equipment cylinder heads for a cost-effective boost in torque and performance. The exclusive bolt-on 4.0" cylinders are engineered with slim-wall spigots that slip into the factory crank case without any additional machining.

    • Black Highlighted
    • 4" flat top pistons team with stock cylinder heads to produce a performance enhancing 10.2:1 compression ratio
    • High-lift SE-585 cam produces a boost in torque throughout the RPM range
    • Includes 4" bolt-on cylinders, forged 10.2:1 compression pistons and rings, SE-585 cams, perfect fit pushrods, SE high capacity roller tappets, high performance valve springs, heavy-duty clutch spring and a top end gasket kit
    • 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
    • Separate purchase of cam spacers is recommended
    • When installed by an authorized Harley-Davidson® Dealer at the time of vehicle delivery, these kits do not impact the vehicle's limited warranty
  • £ 2,381.58
    £ 2,381.58

    Bring your Twin Cam motorcycle up to the same 110 cubic inch displacement and power output as the CVO™ Screamin' Eagle® models without extensive 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
1 - 20 of 34

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