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92500078 Harley 92500078 Screamin` Eagle Milwaukee-Eight Engine Stage IV Kit - 107CI to 128CI

Regular price
$8,271.50 NZD
Sale price
$8,271.50 NZD
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This Stage IV Kit was designed to deliver maximum horsepower - all the way to the redline. Features new CNC-ported heads with 1mm bigger valves 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 126 ft-lb of torque and 121 HP rear-wheel output when paired with Screamin' Eagle Street Cannon Mufflers. 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. When installed by an authorized Harley-Davidson Dealer within 60 days of the vehicle purchase , compliant kits do not impact the vehicle's limited warranty. Kit includes: CNC Ported Cylinder Heads with CNC machined chamber and 1mm larger valves L93 , Stage IV Timer Cover , SE8-517 High-Lift Cam , Forged High Compression Pistons , High Performance Cam Bearing , Tappets , 4.31" Steel Sleeve Cylinders , 64mm Throttle Body and Cast Manifold and High Flow Injectors (5.5 g/sec).
•Stage IV Kit - 114CI to 128CI for Oil-Cooled models
• 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
• Retains Original Equipment Factory Warranty
• 49-State U.S. EPA Compliant on '17-later Touring models


Fits '17-later Touring models equipped with air/Oil-Cooled Milwaukee-Eight 107CI engine. Does not fit Trike models. '17-'19 models require separate purchase of High-Capacity Oil Pump P/N 62400247. '17-'18 Screamin' Eagle High-Capacity Clutch Plate Kit P/N 37000258. All models require ECM recalibration with the Pro Street Tuner or dealership installed Screamin' Eagle calibration for proper installation. Does not fit California models.