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Performance

Upgrade your bike with a little help from:

Principles of performance

Nobody says "No" to more
torque & horsepower

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.

Path to performance

STAGE I

STAGE II

STAGE III

STAGE IV

Move More air & fuel

Give it a lift

Pump up the volume

Top it off

STAGE III + CYLINDER HEADS + THROTTLE BODY

FINISHING TOUCHES

Now that you’ve got the volume, use it the right way. By adding high-flowing ported and matched upper-end components to the bigger engine you can make sure you’re moving as much air and fuel as the engine can take. This stage adds more horsepower to the already impressive Stage III upgrade.

Maximize your horsepower – not the labor. Similar to Stage III, upgrade requires removing the engine’s top end and swapping the cam. The engine remains in the chassis and no machining or custom fitting is required. Special tools and ECM tuning are require.

Required
Required
Required
Required

Vehicle Details

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