Advance Curve Kit, HEI, Pertronix

GM HEI Distributor Advance-Curve Kit by PerTronix®

Chromoly weights and selectable springs allow mechanical-advance curve adjustment.

This PerTronix® HEI advance kit provides replacement weights, a center plate, spring pairs and guide bushings to tune centrifugal advance. The chromoly weights and plate work with three pairs of springs of different tension, allowing the advance rate to be matched to the engine. Installation and tuning instructions are included. These parts adjust mechanical advance with engine speed; vacuum-advance operation remains a separate adjustment.

• Compatible GM HEI mechanical-advance mechanism • Chromoly advance weights and center plate • Three spring pairs with different tensions • Guide bushings and instructions included • Mechanical-advance tuning rather than vacuum-canister adjustment