Screamin' Eagle® Performance Stage Kits take performance to the next level with increased acceleration and improved passing power when compared to stock bikes. No longer will you have to experience all the trial and error that comes with your bike engine modifications.
By separating the process into stages, you have the choice to see how each upgrade affects your bike and your ride. Screamin’ Eagle stage kits are offered in a variety of options designated as Stage I, II, III and IV. The higher number kits provide the greatest increase in performance.
Stage I is the starting point with the option to upgrade to a higher numbered stage kit in the future.
Intake + Exhaust + Tuning = Foundation for Future Upgrades
“I want a simple, bolt-on performance upgrade that enhances the performance, look, and sound of my motorcycle.”
When upgrading your intake and exhaust, you must recalibrate your Engine Control Module (ECM), also known as tuning. Start with the Screamin’ Eagle Pro Street Tuner.
See our Web-based training guide.
Add the Smart Tune Pro - Build off of the Pro Street Tuner and its base calibrations as a starting point.
Maximum Performance + Optimal Efficiency + Automatic Adjustment in all riding conditions and combinations of performance upgrades.
Stage I + Cam Upgrade
Torque: “I want instant passing power at cruising and highway speeds.”
Power: “I want to feel the power build and then pull all the way to the redline.”
Stage I + Cam, Big Bore Cylinders & Pistons
“I want instant power that lasts throughout the entire RPM range. Bigger is better.”
Stage I + Cam, Big Bore Cylinders, Pistons, Cylinder Heads & Throttle Body
“I ride hard and want the absolute best performance upgrade available. Try to keep up…I dare you!”
Built from the bottom up in Milwaukee, our street-tuned Screamin’ Eagle Crate Engines are designed to run with a wide open throttle at high engine speeds and provide instant passing power from cruising speeds. All new 135-cubic-inch Engines available for ’21-later Touring models and 131-cubic-inch Crate Engines available for Softail and earlier Touring models.