Choosing the right performance camshaft kit for your Harley Twin Cam engine can significantly boost power and responsiveness, but the options vary widely. The S&S Cycle Gear Drive Cam Installation Kit offers reliable, straightforward installation for specific models, ideal for those wanting a proven upgrade. Meanwhile, the Andrews Camshaft Upgrade Kit 67N delivers a performance-oriented boost with advanced chain tensioning, suited for experienced riders seeking maximum output. Both options come with tradeoffs: S&S favors ease of fitment within a narrow model range, while Andrews emphasizes high performance but requires more precise installation and compatibility considerations.
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Key Takeaways
- The S&S kit is best for riders with 1999-2006 Harley Twin Cam models seeking a reliable, straightforward upgrade.
- The Andrews 67N kit provides a performance increase with advanced chain tensioning, suited for experienced builders.
- Compatibility and installation complexity are significant factors; the S&S kit is more beginner-friendly, Andrews is more performance-focused.
- Both kits require additional parts or considerations for full compatibility with stock Harley parts.
- Pricing and availability might influence choice, with Andrews generally more performance-centric and S&S more about ease of installation.
| S&S Cycle Gear Drive Cam Installation Kit for Harley-Davidson Twin Cam Motors |  | Best for straightforward, reliable installation on specific Harley models | Application: Harley-Davidson 99-06 Big Twin (excluding 2006 FXD) | Model: S&S Cycle 106-5896 | VIEW ON AMAZON | See Our Full Breakdown | |
| Andrews Camshaft Upgrade Kit 67N for Harley Twin Cam 99-06 |  | Best for performance-focused riders wanting high horsepower gains | Cam Style: 67N | Intake Valve Duration: 252° | Exhaust Valve Duration: 260° | VIEW ON AMAZON | See Our Full Breakdown |
| performance camshaft kit for harley twin cam | Application | Model | Cam Style | Intake Valve Duration |
|---|---|---|---|---|
| S&S Cycle Gear Drive Cam Insta | Harley-Davidson 99-06 Big Twin (excluding 2006 FXD) | S&S Cycle 106-5896 | — | — |
| Andrews Camshaft Upgrade Kit 6 | Harley Davidson Twin Cam 99-06 | — | 67N | 252° |
More Details on Our Top Picks
S&S Cycle Gear Drive Cam Installation Kit for Harley-Davidson Twin Cam Motors
The S&S Cycle Gear Drive Cam Installation Kit stands out for its targeted compatibility with Harley-Davidson Twin Cam engines from 1999 to 2006, excluding the 2006 FXD. It provides all the essential components needed for a cam swap, making it a solid choice for those who want a hassle-free upgrade. Compared with more performance-focused options, this kit is more about reliability and ease of use. It lacks detailed installation instructions, which could pose challenges for less experienced mechanics, and it is limited to a narrow range of Harley models. Still, its dedicated design means fewer surprises during installation and dependable performance gains.
Pros:- Designed specifically for Harley Twin Cam engines
- Includes essential components for cam installation
- Suitable for a wide range of 1999-2006 models
Cons:- Limited to specific Harley models, excluding 2006 FXD
- No detailed installation instructions included
- Less suited for those seeking high-performance gains
Best for: Harley owners with 1999-2006 Twin Cam models seeking a dependable, simple upgrade
Not ideal for: Riders wanting maximum horsepower or those with 2006 FXD models needing broader compatibility
- Application:Harley-Davidson 99-06 Big Twin (excluding 2006 FXD)
- Model:S&S Cycle 106-5896
Our verdict“A reliable, easy-to-install kit perfect for owners of certain Harley Twin Cam models looking for a straightforward upgrade.”
Andrews Camshaft Upgrade Kit 67N for Harley Twin Cam 99-06
The Andrews 67N Camshaft Upgrade Kit offers a significant boost for Harley Twin Cam engines from 1999 to 2006. Its high-flow, high-duration cam profile with 252° intake and 260° exhaust duration clearly targets riders seeking increased horsepower and torque. The kit’s innovative oil pressure-based roller chain tensioning reduces power loss, making it a strong choice for those wanting a performance edge. Compared with the S&S kit, the Andrews kit demands more precise installation and compatibility considerations, especially since it may require additional parts for full integration. Its weight and dimensions are manageable, but it’s best suited for experienced mechanics or enthusiasts comfortable with complex upgrades.
Pros:- Provides a notable performance increase and higher output
- Reduces power loss with advanced oil-pressure chain tensioning
- Compatible with stock Harley Davidson hydraulic lifters
Cons:- Installation can be complex for novices
- Requires additional parts for full compatibility
- Designed for specific Harley models, limiting versatility
Best for: Experienced Harley owners aiming for maximum performance and willing to handle a more complex install
Not ideal for: Beginners or owners with stock Harley parts that aren’t prepared for detailed modifications
- Cam Style:67N
- Intake Valve Duration:252°
- Exhaust Valve Duration:260°
- Intake Lift:.570 inches
- Exhaust Lift:.570 inches
- Application:Harley Davidson Twin Cam 99-06
Our verdict“A performance-centric camshaft kit that delivers real horsepower gains but demands technical skill and additional parts for installation.”
How We Picked
In selecting these kits, I prioritized options that are widely recognized within the Harley community for performance upgrades, ensuring compatibility with Twin Cam engines from 1999 to 2006. I considered their specific roles—whether for ease of installation or maximum horsepower gains—and evaluated user reviews, technical specifications, and the reputation of the manufacturers. The focus was on balancing performance improvements with installation complexity and overall value, aiming to present options for both novices and seasoned enthusiasts.
| performance camshaft kit for harley twin cam | Application |
|---|---|
| S&S Cycle Gear Drive Cam Insta | Harley-Davidson 99-06 Big Twin (excluding 2006 FXD) |
| Andrews Camshaft Upgrade Kit 6 | Harley Davidson Twin Cam 99-06 |
Factors to Consider When Choosing Performance Camshaft Kit For Harley Twin Cam
When choosing a performance camshaft kit for your Harley Twin Cam, it’s essential to consider your riding goals, your mechanical skill level, and the specific model year of your bike. Performance kits vary in complexity—from simple replacements to advanced upgrades requiring additional parts or tuning. Understanding these differences helps ensure you select a kit that aligns with your expectations and technical comfort zone.
Compatibility and Model Range
Verify that the kit is designed for your specific Harley Twin Cam model year and engine type. The S&S kit suits models from 1999-2006, excluding the 2006 FXD, making it ideal for owners of those bikes seeking a straightforward upgrade. The Andrews kit also targets 1999-2006 models but emphasizes performance enhancements, often requiring additional parts for full compatibility. Choosing a kit outside your model range can lead to installation difficulties or suboptimal results.
Installation Complexity and Skill Level
Some kits, like the S&S, are designed for easier installation, even for those with minimal mechanical experience. Others, such as the Andrews, demand more advanced skills due to their performance-oriented design and potential need for extra parts. If you’re a novice, prioritizing kits with clear instructions and fewer component requirements reduces frustration and errors.
Performance Goals vs. Reliability
If your goal is reliable power gains and smooth operation, the S&S kit offers a dependable upgrade. For those chasing maximum horsepower and torque, the Andrews kit provides a more aggressive profile, but at the cost of increased complexity and a potentially higher risk of installation issues. Balance your expectations with your technical comfort level to find the best match.
Frequently Asked Questions
Can I install a performance camshaft kit myself?
Installing a performance camshaft kit can be straightforward if you choose a kit designed for easy installation and if you have some mechanical experience. The S&S kit, for example, is aimed at riders with basic skills, often requiring only standard tools. However, more advanced kits like the Andrews may involve complex procedures, such as timing adjustments and additional parts, making professional installation advisable for most owners without extensive mechanical knowledge.
Will upgrading my camshaft improve my Harley’s performance?
Yes, a properly selected performance camshaft can significantly increase horsepower, torque, and throttle response. The extent of improvement depends on the cam profile and accompanying upgrades, such as intake, exhaust, and tuning. Keep in mind that the gains are most noticeable when paired with compatible supporting modifications, and improper installation can negate potential benefits.
Are performance camshaft kits compatible with stock Harley parts?
Most performance kits are designed to work with stock Harley-Davidson components like hydraulic lifters, but some, particularly high-performance profiles, may require additional modifications or upgraded parts, such as new springs or chain tensioners. Always verify compatibility with your specific model and consider professional tuning to maximize performance and reliability after installation.
How much horsepower can I expect from these upgrades?
The actual horsepower gains vary based on the camshaft profile, supporting modifications, and tuning. Typically, a cam upgrade like the Andrews 67N can add around 10-20 horsepower, while the S&S kit focuses more on reliability and incremental gains. For maximum results, combine a camshaft upgrade with other performance enhancements and proper tuning.
Do I need to tune my Harley after installing a performance camshaft?
In most cases, a tune is highly recommended after installing a performance camshaft to optimize fuel mixture, ignition timing, and overall engine behavior. Proper tuning ensures you realize the full power potential of the new cam and helps maintain engine reliability. Some kits may include recommended tuning procedures or parts, but professional dyno tuning is often the best route for achieving optimal results.
Conclusion
For riders new to performance upgrades or those seeking a simple, reliable enhancement for their 1999-2006 Harley Twin Cam, the S&S Cycle Gear Drive Cam Installation Kit makes the most sense. It offers a straightforward install and dependable performance without requiring extensive modifications. Conversely, seasoned enthusiasts aiming for maximum horsepower and willing to handle more complex installation should consider the Andrews Camshaft Upgrade Kit 67N. This kit delivers higher output but demands more technical skill and additional parts to unlock its full potential. Your choice should align with your mechanical comfort level and performance targets.
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