King Performance 6.72" Billet "Heavy" Pulley System — Complete Kit | Air-Cooled VW

King Performance Billet "Heavy" Pulley System – Complete Kit

Experience superior engine stability and precision with the King Performance "Heavy" Pulley System. Designed for high-performance air-cooled builds, this 100% USA-made kit is engineered to provide the rotating inertia needed for smooth idling and reduced harmonic vibration, especially in high-revving engines.

This "frenched" design features a high-strength steel hub recessed into the crank pulley, ensuring maximum structural integrity. It is also fully EFI-ready, with the back of the pulley pre-tapped to accept the Dub Shop Trigger Wheel for a seamless ignition or fuel injection setup.

Engineering & Material Specs

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

• Superior Hybrid Construction: Pulleys are CNC-machined from 6061-T6511 billet aluminum.

• Frenched Steel Hub: Mounted on a heat-treated 4140 chromoly steel hub with a black zinc finish for lifetime durability and perfect concentricity.

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

• "Heavy" Performance Sizing: * Crank Pulley: 6.720" (170.7mm) Diameter

  • Weight: 3.93 lbs (Provides essential rotating mass for high-performance builds)

  • Alternator Pulley: 4.3" Diameter (Performance ratio)

Configuration Options

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

• Stock OD (1.750")

• Sand Sealed OD

What’s Included

This comprehensive kit includes all necessary high-grade hardware for a professional installation:

• 6.720" Billet "Heavy" Crank Pulley & 4.3" Billet Alternator Pulley

• 7075-T651 Hard Black Anodized Nut

• 6061-T651 Clamp Washer

• Crank Pulley Bolt & Washer

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

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

Technical Notes & Warranty

• EFI Ready: Pre-tapped mounting holes designed for immediate use with the Dub Shop Trigger Wheel.

• Safety Note: A dash "dummy light" is highly recommended to monitor belt status during operation.

• Anodizing Note: Finish may naturally fade or change color over time due to engine heat and UV exposure.