KIT,PWR PRFM UPGR,128,STAGE4,B

Go big or go home. With the largest displacement of any Harley-Davidson Stage Kit, this 107CI to 128CI Stage IV Kit is designed to deliver maximum horsepower – all the way to the redline. Packaged with patent-protected cylinder technology, it allows for the largest bolt-on engine upgrade to any Milwaukee-Eight motor. Features new CNC-ported heads with 1mm bigger valves and fully machined combustion chambers. It’s designed to run wide open at high-end RPMs and provide a significant boost of torque from cruising speed. You’ll feel the difference as soon as you twist the throttle. • Delivers increased response throughout the entire RPM range • Provides thrilling acceleration when twisting the throttle • Maintains flat torque curve from cruising RPM to redline • Can be installed without removing the engine from chassis • Includes CNC Ported Cylinder Head with CNC machined chamber and 1mm larger valves, 128 Stage IV Timer cover, SE8-517 High-Lift Cam, Forged High Compression Pistons • Also includes High Performance Cam Bearing and High Performance Tappets, 4.31" Steel Sleeve Cylinders, 64mm Throttle Body and Cast Manifold, High Flow Injectors (5.5 g/sec) • Pending 49-State U.S. EPA compliant Details

Fits '18-later Softail^® 107CI models. FXFB requires separate purchase of Screamin' Eagle Softail High Flow Exhaust P/N's 64900828 or 64900829. Requires separate purchase of Cam Drive Retention Kit P/N 25566-06. Installation may require Cam Spacer Kit P/N 25928-06. '18-'19 models require separate purchase of High-Capacity Oil Pump P/N 62400247. All models require ECM calibration with Screamin' Eagle Pro Street Tuner or dealership installed Screamin’ Eagle calibration for proper installation. Does not fit California models.

Installation Instructions ECM Calibration Required: Yes Sold Separately: See fitment for additional details Sold In Units: Each Screamin' Eagle Stage Upgrade: Stage IV In the Box: See Description for details WARRANTY: 1 year limited warranty – Go to www.h-d.com/warranty for full details Harley-Davidson^® motorcycles modified with some Screamin’ Eagle^® Performance products must not be used on public roads and, in some cases, may be restricted to closed-course competition. These performance parts are 49-state U.S. EPA compliant but are NOT compliant for sale or use in California on pollution-controlled motor vehicles. California guidelines on tampering can also lead to substantial fines and penalties. Screamin’ Eagle^® Performance products are intended for the experienced rider only.