SKU: 12420139978

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

$134.41 $149.34
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Ships within 48 hours · Estimated delivery Sep 7 - Sep 12

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Description

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

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.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 12420139978

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4.2 ★★★★★
Based on 9 reviews
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Verified Purchase
GritWork
Charlottesville, US
★★★★★ 5
Real walnut wood. High quality.
Color: Walnut Wood, Size: Large, Color: Walnut Wood, Size: Large
This is authentic walnut wood. I was apprehensive at first. My fear was that it was pine stained to the color of walnut. I thought the wood stain would come off on my wrists and wear over time. Turns out this is a genuine chunk of walnut! Worth the $20. I laser engraved my logo onto it and it revealed that it’s 100% walnut to the core. Elegant solution. Perfectly comfortable. Way less corny than those squishy wrist rests from the 2000’s. Nice rubber gaskets on the bottom to keep it from slipping. Does not move while in typing. The exact right size for supporting your wrist on a full size Keychron keyboard. I’m using it with a P6 Ultra. But it would fit any full size Keychron keyboard.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 23, 2026
T
Verified Purchase
The Cannish
New York, US
★★★★★ 5
Surprisingly comfortable and stylish wrist rest!
Color: Walnut Wood, Size: Large
This wrist rest is the perfect compliment to my desk set up. I was hesitant about buying a wood product like this, but I’ve been pleasantly surprised how comfortable and smooth it is during extended use. For the price, it feels like a premium product, and I love that it stays put with the rubber feet. The size is perfect for a full-size keyboard, with just the right thickness to keep your wrist and palms comfortable. If you’re looking for an elevated way to decorate your desk while protecting your wrist, this is a great choice.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 29, 2026
T
Verified Purchase
Thomas Wells
Port Orchard, US
★★★★★ 5
Great wrist rest with a modern look!
Color: Walnut Wood, Size: Medium, Color: Walnut Wood, Size: Medium
This is a great looking addition to my desk. It’s a just the right length to fit my keyboard and I love the walnut coloring! It’s real wood and has nice rubber feet on the bottom to keep it from moving around. The angle is nice for my wrists and it’s easy to clean with just a damp cloth. If I ever wear this one out (which I doubt) I’d buy another!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 31, 2026
E
Verified Purchase
Elektra
Massapequa, US
★★★★★ 5
Super comfortable - much better than memory foam wrist rests!
Color: Walnut Wood, Size: Large, Color: Walnut Wood, Size: Large
Get this wrist rest - you won't be disappointed. Had ergonomic keyboards and have tried memory foam rest in the past and this is much better. Smooth wood, perfect height and very supportive to keep wrists in neutral position when typing. Got the 17.3" and like that there's ample room to not feel squashed, but probably could have done with the medium length. Great angle for my mechanical keyboard. Love it!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 6, 2026
J
Verified Purchase
James M.
Pawtucket, US
★★★★★ 4
What an excellent wrist rest! Except for this one thing....
Color: Walnut Wood, Size: Large
This is a solid piece of wood with great quality. Fantastic large rubber grips on the bottom (left and right sides only). Pro: I use it for editing and gaming. And though I thought the wood might be a bad choice in the long run, it turns out it's pretty nice. Not as comfortable as a gel rest but I knew what I was getting when I ordered it. I buy things for function AND aesthetics. I love how this looks. The uniqueness is really something. I got the natural one instead of the black so that the grains and lines can be easily seen. Con: Unfortunately, after almost 2 months, the wood has warped some. Not enough to effect my typing but, enough that I notice it. The warp is the kind where the opposite angled corners go up and down. While the other 2 corners are fine. In my case, the top left and bottom right, when pressed independently, rock the wrist rest. The top right and bottom left stay grounded. This is why I took a star off. Because there's no way this should be happening. So, looks and quality are up there. The rubber grips are solid. Why it's warping is puzzling to me. NO liquid wasted on it. Or, extreme temperature changes have happened. I've made sure the rubber grips. And that the surface the rest sits on (a glass mouse scrolling top by Superglide) is clean. Yet, I get this slight rocking. It bugs me this all happened right after the return window closed. I would've simply exchanged it. I love it too much. I mean, this is, again, a SOLID piece of wood. Maybe this won't happen for everyone. I mean, it's wood. Eh I would still recommended this regardless.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 24, 2025

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