S&S Cycle Camshafts — 2007-2017 Harley-Davidson Dyna

S&S Cycle 551 Easy Start Cam kit for 2007-2017 Harley-Davidson Dyna with 96–106 CID engines and 9:1–10:1 compression ratio. Bolt-in design improves low-end and midrange torque from idle to 4,000 rpm using stock valve springs and many existing components.

Features

• 551CE cam kit includes cams, gearcover gasket, cam bearings, and installation instructions
• Optimized for idle to 4,000 rpm torque delivery
• Easy Start design allows stock starter motor to crank the engine
• Works with stock valve springs
• Quick installation reusing factory components

Specifications

• Brand: S&S Cycle
• Manufacturer Part #: 106-4947
• Category: Engine Components / Camshafts
• Weight: 3.8 lb

Fitment

Fits 2007–2017 Harley-Davidson Dyna models equipped with 96–106 CID engines and 9:1–10:1 compression ratio. Designed for stock or mildly modified touring bikes.

Frequently Asked Questions

Will this fit my Dyna with aftermarket heads or a big bore?

This cam is rated for 96–106 CID engines with 9:1–10:1 compression. Verify your displacement and compression ratio before ordering; higher-compression or larger-displacement builds may require a different cam profile.

Can I use my stock valve springs with this cam?

Yes — the 551 cam kit is compatible with factory valve springs, eliminating the need for additional spring upgrades.

Do I need a tune after installing these cams?

A fuel management or tuning device is recommended to optimize performance, though the cams will function with stock ECM settings.

How long does installation take?

Most installations take a few hours because the kit allows you to reuse many stock components and avoid extensive disassembly.

Will the stock starter still crank the engine?

Yes — S&S Easy Start cams are engineered to be cranked by the factory starter motor without requiring upgrades.