Quick easy components to lock out timing on GM HEI distributors. 2007-jeep-wrangler-esi6222363 001 in Undersize - Narrowed

001 in Undersize - Narrowed - Small Block Chevy - Each

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Quick easy components to lock out timing on GM HEI distributors. 2007-jeep-wrangler-esi6222363 001 in Undersize - NarrowedMSD 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.