Screamin' Eagle Performance

The Screamin’ Eagle Vortex Extreme combines an exposed air-cleaner design with space for your knee. Harley-Davidson describes freer, less obstructed airflow to the Milwaukee-Eight engine and increased power across the rev range; it gives no measured gain for your particular motorcycle. The shape was developed especially for bikes with fairing lowers, allowing knee movement when using the rear brake and footboard. It also leaves all four pushrods visible, so the intake changes the appearance as well as the space beside the engine.

The complete kit contains the backing plate, air-filter element, cover, rain sock and necessary mounting hardware. The supplied rain sock helps keep water, dust and debris away from the filter; it is an extra protective layer, not a waterproof enclosure. Choose chrome with 29400527 or black with 29400528. The product links below identify the finish as well as the part number.

The exact listings specify 2025-on Softail, 2023-on Touring and 2026-on Trike models with centre-cooled Milwaukee-Eight engines, excluding California models. Installation requires ECM calibration using the Screamin’ Eagle Pro Street Tuner. Check the exact motorcycle and installation requirements on the matching listing: an all-years category does not establish fitment for every year. The film’s 49-state US compliance statement does not establish UK or European road-use approval.

The Screamin' Eagle Extreme Air Cleaner – Circle, 29400488, keeps the familiar round, centre-bolt shape while exposing the filter face to incoming air. Its K&N oiled-cotton element is washable and reusable. Harley-Davidson describes the cleaner as capable of supplying enough clean air for a suitably configured large-displacement engine producing more than 150 hp. That is an airflow-support claim, not a promise that fitting this cleaner alone produces that power.

The manufacturer specifies 20% more airflow than the Original Equipment cleaner and says the design does not need a separate outer cover. It was engineered for the Screamin' Eagle 68 mm throttle body used with Stage IV products and also works with the factory 58 mm throttle body in the specified applications. Washing and re-oiling the element allows it to be reused instead of routinely replacing it. A supplied rain sock helps keep water, dust and debris off the exposed filter; it is additional protection, not a claim that the intake is waterproof.

The film lays out the kit's gloss-black die-cast backplate, open-face filter element and required installation gaskets and hardware. It then shows two optional Extreme Center-Bolt Intake Covers: gloss black 61301362 and chrome 61301363. Their five-spoke die-cast aluminium design has stepped machining inside the spokes. These covers dress the exposed filter while retaining its visible outline. Each cover is sold separately and is a cover only; neither finish includes the air-cleaner kit.

For 29400488, Harley-Davidson requires ECM calibration with the separately sold Screamin' Eagle Pro Street Tuner for proper installation. Match the exact kit to the motorcycle, throttle-body setup and market before ordering. The film explicitly excludes California models, and the manufacturer's current listing identifies this as a 49-state U.S. EPA-compliant product, not approval for every country. Screamin' Eagle sale and road-use restrictions vary by market; confirm the applicable configuration with a Harley-Davidson dealer.

The Screamin’ Eagle Stage IV kit 92500146 takes the specified Softail engine from 117ci to 131ci as a coordinated engine upgrade. Harley-Davidson describes it as a package for riders seeking greater displacement, compression and power-to-weight performance. Its catalogue says many of the components were informed by Factory Racing Team testing for King of the Baggers; that does not mean the complete retail kit is a race-winning specification for your bike.

The package brings together Screamin’ Eagle Extreme CNC-ported cylinder heads, a 68 mm throttle body and a cast 68 mm intake manifold. The SE8-550 high-lift cam and 6.8 g/sec fuel injectors work with that intake to supply air and fuel. Forged high-compression pistons and rings are designed for the increased combustion forces, alongside high-performance tappets and patent-protected 4.31-inch steel-sleeve cylinders. These are complementary engine components, rather than an intake accessory or a generic set of builder parts.

H-D describes the combination as intended for wide-open throttle and higher rpm, with a substantial torque increase when accelerating from cruising speed. Those are manufacturer performance claims, not a measured power or torque result for your motorcycle. The Black Highlighted kit adds Screamin’ Eagle and Stage IV badging to the cylinder heads and timer cover. H-D also states that installation can be completed with the engine still in the chassis; it does not describe this as a simple owner installation.

The exact listing specifies 2025-on Softail models, excludes California models and requires ECM recalibration with the Screamin’ Eagle Pro Street Tuner. This is the particular 117ci-to-131ci kit shown in the film. Confirm your motorcycle, installation requirements and local availability with the exact product information and dealer. H-D explicitly notes that these products are not sold or approved for road use in every country.

The Screamin’ Eagle / Öhlins rear suspension, part 54000384, is a monotube coilover shock with a separate reservoir. Harley-Davidson presents it as a handling and ride-quality upgrade developed with Öhlins for the more demanding Softail rider. Its exposed reservoir and adjusters also give the installation a distinctive appearance. The useful difference is that spring preload, compression damping and rebound damping can each be adjusted, rather than treating every change in load or riding preference as the same setting.

Preload sets the suspension’s sag to suit the weight of the rider, passenger and luggage, using an external adjuster. Compression damping is adjusted at the remote reservoir; rebound damping is adjusted at the bottom of the shock body. The product listing confirms that all three adjustments are tool-free. This gives you separate ways to set the loaded position and fine-tune the shock’s response. The film explains their roles and locations, but supplies no sag target, click settings or load limit for your motorcycle.

Inside are a 46 mm piston and precision CNC-machined, hard-anodised components. H-D describes the high-pressure nitrogen charge as helping the shock resist heat-related damping fade, with a low-friction seal-head design for smooth operation. The exact listing also identifies the low-friction shaft/seal-head arrangement. These are the manufacturer’s construction and performance claims, not a promise that damping can never fade or a measured comparison with your original shock.

H-D states that this unit is fully serviceable and repairable through Öhlins, giving it a maintenance route beyond replacement of the complete shock. That statement does not specify free repairs or a warranty term. The exact product record is for 2025-on Softail models; the film’s broader closing reference to 2025-on Harley-Davidsons should not be read as fitment for every family. Use the matching product below to confirm the motorcycle and installation details.