New Wireless Screamin’ Eagle Pro Street Performance Tuner Simplifies Engine Set-Up

March 2023 P&A Launch.

Harley-Davidson® riders craving no-compromise performance have a thrilling new option with the introduction of the Screamin’ Eagle® 135ci Stage IV Performance Crate Engine. This complete Milwaukee-Eight® engine for 2021-later Touring models is the new benchmark for factory-engineered American V-Twin performance, offering the most displacement, and the most power, ever created by Harley-Davidson for a street-compliant crate engine. Its development was fueled in part by the efforts of the Harley-Davidson® Screamin’ Eagle® factory racing team competing in the MotoAmerica Mission King of the Baggers roadracing series. To simplify set up of high-performance engines Harley-Davidson offers the new wireless Screamin’ Eagle® Pro Street Performance Tuner, the only tuner available to maximize performance while being emissions and warranty compliant.

Engineered and tested as a complete collection of high-performance components and assembled from the bottom up at Harley-Davidson Powertrain Operations in Menomonee Falls, Wisconsin, this street-tuned 135-cubic-inch (2212cc) Screamin’ Eagle Crate Engine is designed to run with a wide-open throttle at high engine speeds and provide instant passing power from cruising speed. The engine delivers 143 lb.-ft. of rear-wheel torque at 3500 RPM and 130 rear-wheel horsepower at 5500 RPM – approximately 28 percent more torque and 41 percent more horsepower at the rear wheel than a production Milwaukee-Eight® 117 engine.