Stage Upgrades: Path To Performance
It's all about the performance, look, and feel with the powerful lineup of Screamin' Eagle Stage Upgrades. No longer will you have to experience all the trial-and-error that comes with your motorcycle's engine modifications. Engineered to generate specific torque and horsepower gains, our Stage Upgrades improve each mile of your ride.
Since the beginning, Harley-Davidson motorcycle riders have felt the pull of amped up powertrain performance. Screamin' Eagle components are the key to greater acceleration, increased passing muscle, and more of that rip-roaring raw exhaust note that makes power more than a little addicting.
STAGE I: Move More Air & Fuel
Intake + Exhaust + Tuning Upgrade = Foundation For All Future Stages. Ideal for riders who want to enhance the performance, look, and sound of their motorcycle. The rider will feel up to a 10%* increase in performance when compared to stock bikes throughout the entire RPM range.
STAGE II: Give It A Lift
Stage I + Cam Upgrade. Torque Kit: Ideal for riders looking for instant passing power at cruising speeds. The rider will feel up to a 15%* increase in performance when compared to stock bikes in the low-to-mid RPM range. Power Kit: Ideal for riders who want to feel the power build and pull all the way to the redline. The rider will feel up to a 25%* increase in performance when compared to stock bikes in the mid-to-upper RPM range.
STAGE III: Pump Up The Volume
Stage II + Big Bore Cylinders & Pistons. Ideal for riders who want the largest engine displacement and increased power throughout the entire RPM range. The rider will experience a performance increase throughout the entire RPM range with up to 35%* increase when compared to stock bikes in the mid-to-upper RPM range. An increase in engine displacement allows the engine to swallow more air and fuel, while a higher compression piston squeezes the air and fuel into a more volatile mixture, generating more power when ignited. Displacement increases are accomplished with larger cylinders, matching pistons and the proper cam upgrade.
STAGE IV: Top It Off
Stage III + Cylinder Heads & Throttle Body. Ideal for riders who want the absolute best Harley-Davidson performance upgrade available. The rider will fell exceptional acceleration, delivering significant gains and up to a 40%* increase when compared to stock bike in the upper RPM range. Highest-level performance upgrade available to provide a maximum increase in displacement, compression, and flow. Higher-flowing CNC ported cylinder heads and larger bore throttle body increase the velocity ad feed large volumes of air and fuel into the engine, which maximizes power on a larger displacement engine. Combines ported cylinder heads and larger throttle body in combination with cylinders, matching pistons and proper cam upgrade.
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*Dynamometer settings, motorcycle condition, variation, climate, and other factors can affect performance output, and results can vary from the performance values declared by Harley-Davidson.
CALIFORNIA: These Screamin' Eagle products are street compliant for sale and use on specific vehicles, outlined in the product's fitment statement within the Sate of California. Screamin' Eagle products are intended for the experienced rider only.