Not long ago, Harley announced its 131-inch Milwaukee Eight crate motor; now you can get all the components to roll your own in the privacy of your own home. Also kits to expand and enhance your M8 107, your M8 114… winter is coming. You know what to do.

H-D Press Release!
MILWAUKEE (OCTOBER 8th, 2020) ? The all-new Harley-Davidson Screamin? Eagle products for your ride are here to keep the thrills rolling mile after mile. High-flow exhaust kits, performance cams, ultra-powerful Screamin? Eagle engines and a comprehensive line of upgrades get you to peak exhilaration quickly and smoothly with the power to handle whatever comes.

 
SCREAMIN’ EAGLE MILWAUKEE-EIGHT ENGINE STAGE IV KIT 114CI TO 131CI FOR SELECT SOFTAIL MODELS With the largest displacement of any Harley-Davidson Stage Kit, this 114/117CI to 131CI Stage IV Kit was designed to deliver maximum horsepower ? all the way to the redline ? available now for select Softail models. Packaged with patent-protected cylinder technology, it allows for the largest Harley-Davidson bolt-on engine upgrade to any Milwaukee-Eight motor.
The Stage IV Kit features new CNC-ported heads with 1mm bigger valves than the previous generation, and fully machined combustion chambers. Coupled with the kit’s high-lift SE8-517 cam, high compression pistons and a 64mm throttle body and intake manifold, this combination delivers a thrilling 135 ft-lb of torque and 124 HP rear-wheel output when paired with Screamin̵...