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 any mechanical timing advance.

• Both of these parts are standard equipment on the MSD Circle Track HEI distributor but will work on most GM HEI's.
• The vacuum advance block off kit bolts in place of the vacuum advance canister on a GM HEI distributor to neatly and effectively lock timing solid.
• 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.
• Easy install
• Perfect for racing applications
• Lockout mechanical advance
• Works on most GM HEI distributors
• Quick, efficient way to lock out timing on GM HEI distributors

Details:

• Distributor Type: Accessories
• Emission Code: 5
• Warranty: Manufacturer's Limited 1 Year Warranty