Harley-Davidson Screamin' Eagle 135CI Stage IV Performance Crate Engine

The Screamin’ Eagle® 135-Cubic-Inch Crate Engine delivers ultimate street-compliant performance for riders seeking maximum displacement, power, and torque. Engineered and tested by Harley-Davidson, this street-tuned engine produces 144 horsepower and 149 ft-lb of torque to the rear wheel, offering wide-open throttle performance and instant passing power from cruising speed. Designed for the serious rider, it combines the finest Screamin’ Eagle® components into a factory-assembled, bolt-in package.

FEATURES

• 135-cubic-inch Screamin’ Eagle® crate engine with Black Highlighted / Chrome finish

• Produces 144 horsepower and 149 ft-lb of torque at the rear wheel

• 11.6:1 compression ratio

• Engineered and tested as a complete high-performance system by Harley-Davidson

• Includes Extreme CNC-ported cylinder heads, SE8-550 high-lift cam, high-compression forged pistons, 68mm throttle body, CNC-machined Extreme Flow 68mm intake manifold, high-performance cam bearing and tappets, patent-protected 4.31" steel sleeve cylinders, 4 5/8" flywheel, 6.8 g/sec fuel injectors, and Screamin’ Eagle® Pro Billet Cam Plate and Oil Pump

• Ready for bolt-in installation in Original Equipment-style Touring chassis

• Designed for wide-open throttle, high RPMs, and significant torque increase from cruising speed

• Stage IV Screamin’ Eagle® performance upgrade

DETAILS

• Fits '23-later FLHXSE and FLTRXSE, '24-later FLHX, FLTRX, and FLTRXSTSE models

• Requires separate purchase of Head Pipe P/N 65600177

• '23-'24 models require separate purchase of Cylinder Head Retrofit Kit P/N 29900147

• ECM recalibration required with Screamin’ Eagle® Pro Street Tuner

• Dealer installation recommended

• Does not fit California models

• Factory assembled at Harley-Davidson Powertrain Operations, Milwaukee, Wisconsin

• 49-State U.S. EPA compliant; not street legal in all countries

• Replacement engines must be fitted with emission control devices appropriate for the vehicle model and year

• Sold individually

• 1-year limited warranty

• Intended for experienced riders; use restrictions may apply for public roads and closed-course competition