Elevate your high-performance air-cooled engine with the King Performance 6.7" Billet Pulley System. This comprehensive kit is designed for builders who demand maximum cooling efficiency and rock-solid reliability. Featuring our signature "frenched" hub design, this system ensures perfect concentricity and a high-end aesthetic while providing a true bolt-on solution for modern EFI or traditional builds.

The Full-Size Advantage

Unlike "power pulleys" that underdrive your cooling fan to save horsepower, this 6.7" (170.7mm) setup is designed for the serious street or performance engine that requires maximum airflow. By maintaining a larger diameter, you ensure your engine stays cool and your charging system stays active, even in demanding conditions.

Engineering & Material Specs

• 100% Made in the USA: Precision-manufactured in-house using premium U.S.-sourced materials.

• Superior Hybrid Construction: CNC-machined from 6061-T6511 billet aluminum for a lightweight yet incredibly strong rotating assembly.

• Frenched Steel Hub: The pulley is mounted to a heat-treated 4340 chromoly steel hub and secured with six stainless steel flat head cap screws. This recessed design eliminates runout and provides lifetime durability.

• Hard-Anodized Protection: Finished in a heavy-duty .0015" thick hard-black anodizing for extreme wear resistance.

• EFI Ready: The back of the pulley comes pre-tapped specifically for the Dub Shop Trigger Wheel, allowing for seamless integration of advanced ignition and fuel injection setups.

What’s Included

This is a complete installation kit featuring premium high-grade hardware to ensure a perfect fit:

• 6.7" Billet Crank Pulley & 3.600" Billet Alternator Pulley

• 7075-T651 Hard Black Anodized Nut: High-strength and wear-resistant.

• 6061-T651 Clamp Washer: Engineered to provide even pressure and a secure fitment.

• Crank Pulley Bolt: High-tensile hardware for a secure, worry-free installation.

• Precision Shims: Includes .005" thick shims to allow for perfect belt alignment.

• Bonus Item: High-quality belt included at no charge (provided as a size recommendation; actual needs may vary based on engine configuration).

Configuration Options

Choose the outer diameter (OD) that fits your specific engine case setup:

• Stock OD (1.750")

• Sand Sealed OD

Warranty & Notes

Manufacturer Guarantee: All King Performance billet products and fasteners are guaranteed for two (2) years from the date of purchase.

Anodizing Note: Like all anodized finishes, the hard black coating may naturally fade or shift in color over time due to engine heat and UV exposure. This is a normal characteristic of the material and does not affect the structural integrity or performance of the pulley.