King Performance 5.25" Billet Pulley System | Air-Cooled VW | Complete Top & Bottom Kit, EFI-Ready

King Performance 5.25" Billet Pulley System — Complete Kit

For high-performance air-cooled builds where clearance, cooling, and engine response matter, the King Performance 5.25" Billet Pulley System strikes the balance. This 100% USA-made kit uses a "frenched" design that recesses the high-strength steel hub into the pulley for maximum stability and a crisp, clean look.

The 5.25" crank pulley paired with the 3.6" alternator pulley brings your engine closer to the factory pulley ratio — charging and cooling better than an aggressive 4.3" power-pulley setup, while giving a slight performance edge over an exact stock ratio for reliable street use.

Vehicle Fitment

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

Key Features & Benefits

• 100% Made in the USA: Precision-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 stock-style hub for durability and perfect concentricity.
• Hard-Anodized: .0015" thick hard black anodizing for extreme wear resistance.
• EFI Ready: Pre-tapped for the Dub Shop Trigger Wheel.

What's Included

• 5.25" Billet Crank Pulley & 3.600" Billet Alternator Pulley
• 7075-T651 Hard Black Anodized Nut
• 6061-T651 Clamp Washer
• Crank Pulley Bolt
• 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: 5.25" diameter
• Alternator Pulley: 3.600" diameter
• Material: 6061-T6511 billet aluminum
• Hub: 4140 chromoly steel
• Finish: .0015" hard black anodized
• Warranty: 2 years from date of purchase

Frequently Asked Questions

• What's the warranty? Two years from date of purchase on all King Performance billet products and fasteners.
• Will the anodizing fade? Some color change over time from engine heat and UV is normal and doesn't affect function.
• Is a belt included? Yes, a sized belt ships with the kit at no charge as a starting recommendation.
• Is this EFI-ready? Yes, pre-tapped for the Dub Shop Trigger Wheel.

Explore Related Categories

Engine, Engine Parts, All Air-Cooled VW