Not Ranked
I had 6 bulbs in my Superformance. Switched all 4 rears to dual element LEDs. Everything worked as expected, flashed normally. When I changed the fronts to dual element LEDs, same type as rears, it wouldn't flash for turn signals. I tried the LED specific flasher units, still failed. It was easier to keep the incandescent 1157 bulbs in the front than to chase the demons. Jim
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