King Performance 6.72" "Heavy" Billet Pulley System | Air-Cooled VW | Complete Kit, EFI-Ready

King Performance 6.72" Billet "Heavy" Pulley System — Complete Kit

Get superior engine stability with the King Performance "Heavy" Pulley System. Built for high-performance air-cooled engines, this 100% USA-made kit adds the rotating inertia needed for smooth idling and reduced harmonic vibration, especially in high-revving builds.

The "frenched" design recesses a high-strength steel hub into the crank pulley for maximum structural integrity. It's fully EFI-ready, with the back pre-tapped for the Dub Shop Trigger Wheel.

Vehicle Fitment

• Air-Cooled VW (Type 1): Beetle, All Years

Key Features & Benefits

• 100% Made in the USA: Manufactured in-house from premium U.S.-sourced materials.
• Hybrid Construction: Pulleys CNC-machined from 6061-T6511 billet aluminum.
• Frenched Steel Hub: Heat-treated 4140 chromoly steel hub with a black zinc finish for durability and concentricity.
• Hard-Anodized: .0015" thick hard black anodizing for extreme wear resistance.
• "Heavy" Rotating Mass: 3.93 lb crank pulley for essential rotating inertia in high-performance builds.
• EFI Ready: Pre-tapped for the Dub Shop Trigger Wheel.

What's Included

• 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: .005" thick, for belt alignment.
• Bonus: High-quality belt included at no charge (as a size recommendation; actual needs may vary).

Technical Specifications

• Crank Pulley: 6.720" (170.7mm) diameter, 3.93 lbs
• Alternator Pulley: 4.3" diameter
• Material: 6061-T6511 billet aluminum
• Hub: 4140 chromoly steel, black zinc finish
• Finish: .0015" hard black anodized
• Configuration: Stock OD (1.750") or Sand Sealed OD
• Warranty: 2 years from date of purchase

Frequently Asked Questions

• What does "Heavy" mean? Added rotating mass (3.93 lb crank pulley) for smoother idle and reduced harmonic vibration at high RPM.
• What OD options are available? Stock OD (1.750") or Sand Sealed OD, depending on your case setup.
• What's the warranty? Two years from date of purchase on all King Performance billet products and fasteners.
• Is a belt included? Yes, included at no charge as a sizing recommendation.

Explore Related Categories

Engine, Engine Parts, All Air-Cooled VW