MSD 8428 Distributor Mechanical Advance

Compatible with GM® HEI. This product is not created or sold by GM®. Kit comes with new advance weights, springs to set the rate of advance and new bushings.;

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);