Harley-Davidson is taking the adage “no replacement for displacement” to heart with the launch of its “biggest, most powerful street-compliant engine” ever, the Screamin’ Eagle Milwaukee-Eight 131 Crate Engine. The 131 cubic-inch (2151cc) V-Twin has massive 4.31-inch pistons with ported heads fed by high-flow fuel injectors. Valves in the four-valve cylinder heads are 1mm bigger than before while the monster throttle body measures 64mm. A high-lift SE8-517 camshaft and high-performance cam bearing are also part of the Screamin’ Eagle 131 package. Harley says the engine’s built to run at high rpm and torque levels are taken to new highs from the first crack of the throttle. Add a set of Screamin’ Eagle Street Cannon mufflers and Harley claims the M8 131 is good for 135 lb-ft of torque and 124 horsepower at the rear wheel.

“Our adrenaline-seeking riders asked for thrilling power and torque with reliability,” said Harley-Davidson Product Manager James Crean in a press release. “The Screamin’ Eagle 131 Crate Engine delivers exactly that.”

The Milwaukee-Eight 131 Crate Engine fits 2017-later Harley-Davidson Touring motorcycles with either a Milwaukee-Eight Oil-Cooled or Twin-Cooled engine and select 2018-later Softail motorcycles. It costs $6,195 for oil cooled engines or $6,395 for the Twin Cooled version. When installed by an authorized Harley dealer, the Screamin’ Eagle 131 is backed by a 12-month factory limited warranty. There are a few other expenses to take into consideration, though. Harleys from 2017-19 will need to purchase a high-capacity oil pump as well while 2017-18 models will need to upgrade to a Screamin’ Eagle High-Capacity Clutch Plate Kit, and all motorcycles will need an ECM re-calibration.

The Screamin’ Eagle M8 131 is available in Black and Chrome or Black and Gloss Black and features special 131 Stage IV badging on the cylinder heads and cover. We popped into Harley’s Southern California fleet center last week where they fired up a Street Glide rockin’ the new Screamin’ Eagle and the note was deep, angry, and ready to be uncorked.