SKU: 49188882379

Diode Dynamics 4257 HP24 LED Bulb - Cool - White Switchback (Pair)

$63.59 $70.66
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Ships within 48 hours · Estimated delivery Aug 7 - Aug 12

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Description

Diode Dynamics 4257 HP24 LED Bulb - Cool - White Switchback (Pair)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

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
2015-2023 Ford F-150 King Ranch
2015-2023 Ford F-150 Lariat
2016-2023 Ford F-150 Limited
2015-2023 Ford F-150 Platinum
2018-2023 Ford F-150 Police Responder
2017-2023 Ford F-150 Raptor
2016-2023 Ford F-150 SSV
2021-2023 Ford F-150 Tremor
2015-2023 Ford F-150 XL
2015-2023 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
2008-2024 Ford F-250 Super Duty King Ranch
2008-2024 Ford F-250 Super Duty Lariat
2018-2024 Ford F-250 Super Duty Limited
2013-2024 Ford F-250 Super Duty Platinum
2008-2024 Ford F-250 Super Duty XL
2008-2024 Ford F-250 Super Duty XLT
2009-2010 Ford F-350 Super Duty Cabela's
2008-2009 Ford F-350 Super Duty FX4
2008-2010 Ford F-350 Super Duty Harley-Davidson Edition
2008-2024 Ford F-350 Super Duty King Ranch
2008-2024 Ford F-350 Super Duty Lariat
2018-2024 Ford F-350 Super Duty Limited
2013-2024 Ford F-350 Super Duty Platinum
2008-2024 Ford F-350 Super Duty XL
2008-2024 Ford F-350 Super Duty XLT
2022-2026 Ford Maverick Lariat
2025-2026 Ford Maverick Lobo
2025-2026 Ford Maverick Tremor
2022-2026 Ford Maverick XL
2022-2026 Ford Maverick XLT
Shipping Notes
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Exchange/Return Notes
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  • Final sale items are not eligible for returns or exchanges.
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SKU: 49188882379

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4.6 ★★★★★
Based on 7 reviews
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Product Reviews
M
Verified Purchase
M. Hollar
Battle Creek, US
★★★★★ 5
LOVE this pillow!!!! I have 2!!!!
Size: Queen (Mid Loft), Number of Items: 1
Well…..I have a love affair with these latex pillows. I purchased 2 of them. I have been allergic to feathers since birth and could only use latex pillows growing up. But, they became very hard to find for many years. I tried all the other kinds of pillows on the market and hated them all!!! “Won’t go flat!”….. whatever! They would go flat almost immediately. Or “Good for side sleepers!”….. NOPE!! I had a stiff neck for a week!! DONE with all of them. So,I finally got on Amazon and found this pillow. Ahhhhhh!! Loved it. Slept like a log! All night! Didn’t go flat!! No stiff neck!!! A winner!!!! Frankly,I don’t care about the cost… yeah…I know….we call have to count our change……including me. I saved to buy this pillow…..both times. AND, I would do it AGAIN!!!! And…proud to do it! So, if you have had it with all of those new prefangled so-called pillows…try this one. I would only avoid it like the plague if you are allergic to latex. Otherwise,I would definitely recommend this pillow! Wherever I go….my pillow goes. Camping, on a trip, to visit relatives…..my pillow will travel!!!!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 3, 2025
R
Verified Purchase
River
Los Angeles, US
★★★★★ 5
So comfy
Size: King (Pack of 1), Style: Standard Loft (4" - 5")
I spent time looking up/watching videos on pillows for neck pain and this one comes up a lot. I’m someone that used to wake up every few weeks with a stiff neck so bad it could make me cry at work. I haven’t had that happen once after months of using this pillow. I look forward to laying my head down on it every night. It’s a luxury experience every time. I think what it does so well is maintain its shape. You can really squish it up how you want and it stays there even after hours. Moldable but somehow still firm. It’s expensive but to me the value is there because I no longer get crazy neck pain from sleep. Worth trying it out for sure. Btw I was stuck between this is and Purple brands couple top end options. I never got around to trying them because I tried this one first and was very satisfied! Feb 2026. Still use it every night and it's still protecting me from neck pain I used to get from sleeping. It's held up amazing. Hope to use it for many more years.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 18, 2025
A
Verified Purchase
Amazon Customer
Birmingham, US
★★★★★ 5
Saatva Pillow is great
Size: Standard/Queen (Pack of 1), Style: Standard Loft (4" - 5")
So far this is the best pillow I have had in the last 10 years and I have tried two Purple pillows a couple different memory foam and Gel pillows at least 4 more pillows that I can't even remember the names of. My neck and shoulders are almost pain free. I have also been doing more stretching of my arms which is also helping, but this pillow has really made the most difference in the pain I have had, I felt difference from the first time I put my head on it. It's comfortable, the perfect height I got the 4"-5", I also got the queen size and it's great. It supports my head just right. I also ordered the Saatva Classic 14" mattress from the company and I sure hope it's as good or better would be great because I have back issues for the last 50 years.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 16, 2025
Y
Verified Purchase
YL
Port Orchard, US
★★★★★ 1
Cotton Fluff Around a Mostly Empty Bag
Size: King (Pack of 1), Style: High Loft (6"-7")
Bought the high-loft king, thinking it would be a great (tall) side-sleeper. What I got? A very nice, completely compressible cotton outer shell wrapped around a bag a bit smaller than a standard pillow. In that bag? A tiny amount of small latex chunks, just about a third full. That’s right, some cotton fluff around a basically empty bag. Could you buy some latex yourself and add it? No, the bag is sewn shut. You could probably fill a small pillow with latex you bought elsewhere and put that in. But seriously, what did you pay Saatva for in that case? Probably as close as I’ve seen a major/high-reputation company get towards a literal example of rip off.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 31, 2026
P
Verified Purchase
Perry Baker
Grantham, US
★★★★★ 3
Wrong item ships/decent pillow/price unjustified
Size: Standard/Queen (Pack of 1), Style: Standard Loft (4" - 5")
Sent me the wrong pillow twice in a row. It said high loft and standard loft on the packing, not sure what the problem is. I ordered standard loft both times, and both times they sent high loft. That name is very deceiving though. If what I have is high loft, the standard loft wouldn’t be much thicker than your standard flat down pillow. If you’d like any sort of neck support I’d suggest starting with the high loft and going down instead of the other way around. I am 5’ 7” 130lbs and this pillow does not lift my neck up further than neutral, which is a good thing. Shredded memory foam pillows are significantly higher or thicker if that helps. Pillow itself grew on me. You can definitely feel that there is a different material in the center of the pillow. I ordered it as a gift and ended up keeping both pillows. The price tag on this item is absolutely outrageous. I would have never ordered it for myself. Saatva products don’t last in my experience, we got their firmest mattress and within 2 years it was sagging horribly. I am interested to see how long this pillow lasts!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 19, 2026

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