Why Upgrade to an Adjustable Cam Gear?

Factory cam timing is designed to satisfy emissions, fuel economy, and broad drivability requirements. Adjustable cam gears allow enthusiasts to optimize valve timing for their specific engine combination.

Benefits include:

• Increased horsepower
• Improved torque
• Better throttle response
• Adjustable powerband
• Optimized aftermarket camshaft performance

They’re especially useful after installing upgraded camshafts, increasing compression, or adding forced induction.

Precision Timing Adjustment

The Skunk2 Pro Series Cam Gear features:

• ±10 degrees of adjustment
• Laser-etched timing marks
• Directional reference markings
• Precise one-degree tuning capability

This allows experienced tuners to advance or retard cam timing to optimize power for street driving, drag racing, road racing, or autocross.

CNC-Machined 7075-T6 Billet Aluminum

The gear is CNC-machined from aerospace-grade 7075-T6 billet aluminum, providing exceptional strength while minimizing weight.

Benefits include:

• Outstanding durability
• Lightweight construction
• Improved engine response
• Reduced rotational inertia

Compared to factory steel components, the reduced rotating mass helps the engine rev more freely.

35% Lighter Than OEM

Skunk2 engineered the Pro Series Cam Gear to weigh approximately 35% less than the factory cam gear.

Reducing rotational mass contributes to:

• Faster throttle response
• Improved engine acceleration
• Better high-RPM performance

Every ounce removed from rotating components helps improve overall engine responsiveness.

Hard-Anodized Gear Teeth

The outer timing gear features hard-anodized teeth for improved wear resistance.

Advantages include:

• Longer service life
• Reduced timing belt wear
• Increased durability
• Reliable performance under aggressive driving conditions

Six-Bolt Locking Design

Unlike some adjustable cam gears that rely on fewer fasteners, Skunk2 utilizes its signature six-bolt locking mechanism.

Benefits include:

• Excellent clamping force
• Reduced chance of timing slip
• Secure adjustments
• Proven reliability in racing applications

This design has been trusted on drag, road race, and time attack cars for more than a decade.

Ideal for Performance D-Series Builds

The Pro Series Cam Gear works exceptionally well with:

• Skunk2 camshafts
• Brian Crower camshafts
• Turbocharged D16 builds
• Naturally aspirated D16Y8 projects
• Ported cylinder heads
• Performance intake manifolds
• Larger throttle bodies
• Hondata ECU tuning

For maximum gains, adjustable cam gears should always be tuned on a chassis dyno.

Installation Notes

The gear installs as a direct replacement for the factory cam gear.

Important: This gear does not include the woodruff key. Skunk2 recommends using the OEM Honda B-Series woodruff key (Part Number 90741-657-000) during installation.

Professional cam timing verification and ECU tuning are highly recommended after installation.

Final Verdict

The Skunk2 Racing Pro Series Cam Gear (304-05-5170) remains one of the best cam timing upgrades available for Honda SOHC D-Series engines. Its lightweight billet aluminum construction, precision laser-etched timing marks, hard-anodized gear teeth, and race-proven six-bolt locking design make it an excellent choice for everything from daily drivers to turbocharged street builds and dedicated race cars.

Whether you’re building a D16Y8-powered Civic, a turbo D16Z6 CR-X, or a naturally aspirated Del Sol, this adjustable cam gear provides the tuning flexibility needed to unlock your engine’s full performance potential.