What specific Harley-Davidson models does this camshaft kit fit?

This S&S Cycle 551G camshaft kit is designed for 1999 through 2006 Harley-Davidson Big Twin models. This includes a broad range of touring, Softail, and Dyna motorcycles.

What are the benefits of using inner gears on the camshafts?

Using inner gears on the camshafts eliminates the need for traditional tensioner shoes. This means there are no parts that can wear out or potentially fail over time, leading to more consistent valve timing accuracy and reduced maintenance concerns.

Does this kit include everything needed for installation?

This kit includes the 551G camshafts with inner gears and an outer cam drive gear kit. While it covers the core camshaft components, it's always recommended to consult the manufacturer's installation instructions for any additional hardware or specialized tools that may be required for your specific motorcycle.

Specifications

Brand: S&S Cycle
Part #: 330-0100
UPC: 330-0100

S&S Cycle 99-06 BT 551G w/ Inner Gears Camshaft Kit

Name: S&S Cycle 99-06 BT 551G w/ Inner Gears Camshaft Kit
Brand: S&S Cycle
SKU: s-s-cycle-s-s-cycle-99-06-bt-551g-w-inner-gears-camshaft-kit-t14-619417
Price: 948.95 USD
Availability: BackOrder

$948.95

On Backorder — Expected to ship by May 7, 2026

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

S&S Cycle 99-06 BT 551G w/ Inner Gears Camshaft Kit. Improves valve timing accuracy by eliminating timing chain lash.

Key Features

Fits 1999-2006 Harley-Davidson Big Twin models.
Improves valve timing accuracy by eliminating timing chain lash.
Includes camshafts with inner gears, eliminating tensioner shoes that can wear out or fail.
Comes with an outer cam drive gear kit for a complete installation.
Camshaft specifications: Intake Duration at 0.053 is 216º, Exhaust Duration at 0.053 is 238º.
Valve Lift: Intake is 0.551", Exhaust is 0.551".

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Will this fit your vehicle?

About this part

Product Details

When you're diving into the engine of your Harley-Davidson Big Twin from 1999-2006, this S&S Cycle 551G Camshaft Kit with inner gears is a solid choice for improving valve timing accuracy. This kit is designed to eliminate the slack, or lash, that can develop in the timing chain, leading to more precise control over when your valves open and close. This precision can translate to a smoother running engine and more consistent performance.

What you get in this kit is a comprehensive package to get the job done right. It includes the 551G camshafts themselves, which feature integrated inner gears. This design means you won't have to worry about wear and tear on separate tensioner shoes, a common failure point in other systems. You also receive an outer cam drive gear kit, ensuring all the necessary components for a complete and reliable camshaft installation are included. The camshaft specs show a duration at 0.053 of 216 degrees for intake and 238 degrees for exhaust, with a valve lift of 0.551 inches on both. Timing opens at 17 degrees intake and 41 degrees exhaust, closing at 19 degrees intake and 17 degrees exhaust.

This kit is a significant upgrade for your Harley-Davidson, offering a well-built solution for a critical engine component. It's designed to fit a wide range of Big Twin models, including popular bikes like the Road King, Electra Glide, and Dyna Super Glide. While this kit is not CARB approved and cannot be shipped to California, it's a popular choice for builders looking for improved valve timing accuracy and a more robust camshaft system.