A Stage I upgrade is ideal for riders that want to enhance the performance, look and sound of their motorcycle. Match any Screamin' Eagle high-flow air cleaner and exhaust, along with the proper ECM calibration to increase the air flow into and out of the engine. The rider will feel up to a 10%* increase in performance over stock throughout the entire RPM range.
It's all about performance, look and feel with the powerful lineup of performance-enhancing Screamin' Eagle Stage Upgrades. Stages I-IV offer complete street-compliant performance configurations engineered to generate specific torque and horsepower gains. Eliminating all the guesswork and trial-and-error testing normally associated with engine modifications.
Stage I: Start Here
The whole point of a Stage I is to move more air and fuel. It is the foundation for all future stages and a great place to start - even if you have aspirations to go bigger or better. A Stage I Kit is comprised of three components: intake, exhaust and tuning. Depending on the performance you are looking for and what look you are going for you can build your own Stage I Kit.
Intake: Air Cleaners
Screamin' Eagle Air Cleaner Kits allow free-breathing and unobstructed airflow to your Milwaukee-Eight engine.
Screamin' Eagle exhaust is dialed in to enhance the performance of your Milwaukee-Eight engine and when paired with a free-flowing air cleaner and proper tuning, delivers horsepower and torque gains you can feel.
Tuning: Pro Street Tuner and Smart Tune Pro
All Screamin' Eagle performance upgrades require Engine Control Module (ECM) recalibration, also known as tuning. The best method for tuning your stage upgrades is with the Screamin' Eagle Pro Street Tuner and Smart Tune Pro.
Customizing the performance and look of your motorcycle can be challenging. We're here to help. Schedule a Customization Appointment with one of our Specialists today.
*Dynamometer settings, motorcycle condition, variation, climate and other factors can affect performance output and can vary from the performance values declared by Harley-Davidson.
50-State street-compliant stage upgrades retain the Motorcycle Original Equipment Manufacturer's Warranty.