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GM HEI Weight & Spring Kit

The Kit comes with new advance weights, springs to set the rate of advance and new bushings.

PART# 8428

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$29.11   Suggested Retail
$23.58   Holleydays Price
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This kit will help you achieve the solid ignition timing you need! This is designed for the Street Fire HEI and stock style HEI Distributors. (Not for use with Billet and Pro-Billet MSD Distributors)


  • Fits Street-Fire HEI
  • Fits Stock Style HEI Distributors
  • Not for MSD Billet and Pro-Billet Distributors


Distributor TypeHEI
Emission Code5
Product TypeDistributors and Components
WarrantyLimited 1 Year Warranty
Part Number8428



This part is legal for sale or use on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations.

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Warranty Information

Limited 1 Year Warranty: See Details
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        *Free Shipping & Handling only offered to the contiguous US on orders over $100, excludes clearance parts and oversized packages.

        Some parts are not legal for use in California or other states with similar regulations.

         X  Holleydays 2020 20% off and DD
         X  Holleydays 2020 20% off and DD