4257NA 4257 switchback bulbs LED turn signal lights replacement, dual color 6000K white/amber yellow upgrade OEM incandescent blinker lamps for 2019-2021 , F-250 super duty, F-350 super duty. front turn signal lights.
Light white for parking lights or daytime running lights. Light up amber-off-amber-off for turn signal lights instead of amber all the time to make more noticeable.
Extra load resistors maybe required to avoid the signal hyper flash or error code.
For all orders exceeding a value of 100USD shipping is offered for free.
Returns will be accepted for up to 10 days of Customer’s receipt or tracking number on unworn items. You, as a Customer, are obliged to inform us via email before you return the item.
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