Vacuum Advance Lockout for GM HEI

MSD offers two kits to make locking out mechanical and vacuum timing advance in HEI distributors an easy task for Circle track racers. No more welding a tac on the mechanical advance weights or trying to find a way to keep the vacuum advance from moving once the canister is removed.

Features & Benefits
Quick, efficient way to lock out timing on GM HEI distributors

Fits: Quick easy components to lock out timing on GM HEI distributors.

Installation note: Will not work on MSD Pro Billet HEI PN 8365 or 83653.

Specifications