A Stage 2 upgrade is often considered the "sweet spot" for Harley-Davidson performance. While Stage 1 lets the bike breathe, Stage 2 focuses on the heart of the engine: the camshaft.

It’s the jump from simply improving efficiency to fundamentally changing the bike's power delivery and personality.

What’s in the Kit?

A Stage 2 upgrade is cumulative, meaning it requires everything from Stage 1 to function correctly.

• Performance Camshaft: The star of the show. It changes when and how long your valves stay open.

• Adjustable Pushrods: Usually required so the technician doesn't have to disassemble the entire top end of the engine to install the cam.

• High-Performance Tappets/Lifters: Often upgraded to handle the increased lift and stress of the new cam.

   

• Stage 1 Essentials (Prerequisites): * High-flow air cleaner.

  • Free-flowing exhaust.

  • An EFI Tuner (like the Screamin' Eagle Pro Street Tuner or a FuelPak) to recalibrate the fuel map.

The Big Choice: Torque vs. Power

When you go Stage 2, you have to choose a "flavor" of camshaft based on how you ride:

Why Do It?

1. Passing Power: No more downshifting twice to get around a semi-truck on the highway.

2. The "Idle": A more aggressive cam often brings back that rhythmic, "loping" Harley sound that modern stock bikes sometimes lack.

3. Efficiency: Interestingly, because the engine doesn't have to work as hard to maintain speed, many riders see little to no drop in fuel economy during steady cruising.

A Note on Warranty: If your bike is still under factory warranty, stick with Screamin’ Eagle parts and have a dealership perform the install. Aftermarket cams (like Woods or S&S) offer more "bang," but they will usually void your powertrain warranty.