MSD8428 by MSD IGNITION
Spark Advance, Street Fire, Mechanical Advance Kit, Weights / Springs, Gm / Street Fire HEI Distributors
HEI Advance Curve Kit MSD8428 Kit includes new advance weights, springs and bushings. Fits stock HEI distributors and will deliver solid ignition timing. Will not work with MSD8365 Pro-Billet HEI distributor
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