- MY NEW MERCH! SHOP AT: Hi everyone, welcome back. Today I will be installing Mustang (S550) LED arrow turn signals from OPT7. I am very excited to install these as I wanted them for some time. The lights are unique and really changes up the front appearance of the car when they're on. My Shelby GT350 has an upgraded look from the stock turn signals and yellow bulbs. You can find out more information by visiting:
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