Vacuum Advance Lockout for GM HEI - 88364 vacuum-pumps Year Make Model Engine 2006-2009

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Vacuum Advance Lockout for GM HEI - 88364 vacuum-pumps Year Make Model Engine 2006-2009Overview: 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. MSDs mechanical advance lockout plate replaces the mechanical advance weights and simply slides over the pins on the shaft and the advance assembly to eliminate