I have for sale the correct Flasher canister for your Shelby GT350 and GT500. Given that the Shelby's had sequential flashers, they required a heavy duty flasher canister installed by Shelby when the cars were manufactured. This canister is a direct replacement and fix for your worn out of slowly moving sequential lights.
I have a small inventory of these Flasher canisters, so get them or save one for your car now.
I want $50 each including shipping to lower 48 states.