- New Arrival
Designed as part of the 128CI and 131CI Screamin’ Eagle® Milwaukee-Eight® Stage IV Performance Kit, this Second Generation of Extreme Ported Cylinder Heads has been meticulously designed to optimize air/fuel flow and velocity. Improving on the First Generation of CNC-Ported Milwaukee-Eight® Cylinder Heads, the Screamin' Eagle® team refined the intake and exhaust ports to maximize the flow of high-velocity air through the 1mm larger valves of 128CI and 131CI engines and fully machined the combustion chamber to optimize combustion efficiency.
- Replacement cylinder heads for Twin-Cooled™ '17-later Milwaukee-Eight® models equipped with 128 or 131CI Stage IV kits
- When combined with a larger bore throttle body, these CNC Cylinder Heads provide significantly improved efficiency of cylinder filling, leading to more explosive power and increased rear-wheel torque when compared to stock
- Factory equipped with high-performance valve springs that remain stable with high-lift cams and in high-RPM operation
Dealer Install RecommendedYes
Warranty1 year limited warranty – Go to www.h-d.com/warranty for full details
Requires ECM CalibrationYes
Sold in UnitPair
In The BoxFront and Rear CNC Ported Heads
Sold SeparatelyScreamin’ Eagle Pro Street Tuner
Upgrade Stage LevelStage IV
Replacement cylinder heads for Twin-Cooled™ '17-later Milwaukee-Eight® models equipped with 128 or 131CI Stage IV kits. All models require ECM calibration with Screamin’ Eagle® Pro Street Tuner for proper installation. See Dealer for details.
Bike not listed?
Select your year and model to see all the parts that fit your bike.
- These Screamin' Eagle® products are 50-State U.S. EPA compliant for sale and use on all applicable vehicles, including those that are pollution controlled. See Genuine Motor Parts and Accessories or Screamin' Eagle Accessories catalog for fitment information. Screamin' Eagle Performance products are intended for the experienced rider only.
Q & A
Please Hold Your Iron Horses