GM HEI Weight & Spring Kit
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MSD Ignition GM HEI Weight & Spring Kit

Part No. 8428 Warranty Details  
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Fit of this part varies by vehicle & equipment specs Type of Fit

This kit will help you achieve the solid ignition timing you need! The kit comes with new advance weights, springs to set the rate of advance and new bushings. This is designed for the Street Fire HEI and stock style HEI distributors. (Not for use with MSD's PN 8365 Pro-Billet HEI).

Product Features:
  • Advance kit for MSD and Street Fire HEI distributors
  • Three sets of advance springs supplied
  • Two sets stop bushings supplied
  • For use with MSD and Street Fire distributors only
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