There is now a Harley-Davidson Screamin’ Eagle 131ci engine kit for selected Softail motorcycles running Milwaukee-Eight 114ci and 117cc motors. The Stage IV Kit creates massive torque and the ability to operate effectively at high rpm. Let’s take a look at the fast facts.
1. Harley-Davidson claims the Stage IV Kit puts out 124 horsepower at the rear wheel, along with 135 ft-lbs of torque. To get there, however, you have to add the Screamin’ Eagle Street Cannon Mufflers.