Features True replacement for factory incandescent 4257-size front turn signal bulb. Custom-molded base connector for correct fitment. Adds cool white running light, along with amber turn signal. High-power Samsung LEDs arranged around the bulb. No yellow appearance when switched off. Non-polar and CK compatible. Plug and play, simple installation. Overview Upgrade. Add dual-color functionality and a modern appearance to your front turn signals with the 4257 HP24 turn signal bulb. Populated with sixteen amber chips and eight white chips, this bulb lights up white when your headlights are turned on, and flashes amber when the turn signals are activated. Housed in an aluminum casing for maximum heatsinking properties, the HP24 will last for years to come. Best of all, installation only takes minutes - simply take out your factory bulb and the HP24 will fit snugly in the socket. The 4257 HP24 Switchback bulb features a custom-molded base connector, making it a true replacement for factory incandescent 4257-size front turn signal bulbs. Unlike a 3157 bulb that includes tabs on either side of the bulb, a 4257 bulb does not. The 4257 HP24 Switchback bulb is compatible with Ford vehicles using a dual-filament 4257-size front turn signal bulb with a clear reflector lens. Brightness. At 410 lumens, the HP24 will provide about double the total light output compared to your factory bulb. All Diode Dynamics LED lighting is rated with accurate, measured lumen figures, not calculations or guesses. We test the true output in-house, and provide you the real numbers to compare. Reliability. Unlike other bulbs on the market, this bulb is built with constant-current circuitry, along with transient suppression, meaning this bulb will last for years to come.
Installation Instructions


This Part Fits:

Year	Make	Model	Submodel
2015-2018	Ford	F-150	King Ranch
2015-2018	Ford	F-150	Lariat
2016-2018	Ford	F-150	Limited
2015-2018	Ford	F-150	Platinum
2018	Ford	F-150	Police Responder
2017-2018	Ford	F-150	Raptor
2016-2018	Ford	F-150	SSV
2015-2018	Ford	F-150	XL
2015-2018	Ford	F-150	XLT
2009-2010	Ford	F-250 Super Duty	Cabela's
2008-2009	Ford	F-250 Super Duty	FX4
2008-2010	Ford	F-250 Super Duty	Harley-Davidson Edition
2008-2017	Ford	F-250 Super Duty	King Ranch
2008-2017	Ford	F-250 Super Duty	Lariat
2013-2017	Ford	F-250 Super Duty	Platinum
2008-2017	Ford	F-250 Super Duty	XL
2008-2017	Ford	F-250 Super Duty	XLT