MSD Performance 8428 - GM HEI Weight and Spring Kit

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.

• Kit helps achieve solid ignition timing
• For stock style and street fire HEI Distributors
• Comes with new weights/springs/bushings