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4257: XB LED Bulbs (Resistor-Free)

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Brand: Morimoto




PART #: 1 x LED417

*Guaranteed Fitment
Easy Return


Introducing the 4257 Morimoto XB LED Bulbs – a game-changer for your vehicle's lighting system. In a world where incandescent bulbs still dominate, these plug-and-play LED bulbs bring innovation to the table. With a powerful 30W output, they offer unbeatable brightness for turn signals, parking lights, brake lights, and tail lights, instantly elevating performance, style, and safety. What sets these bulbs apart is their resistor-free design, eliminating hyper-flashing issues without the need for extra resistors. They maintain their intensity for over 30 minutes without overheating. Plus, they're compatible with both CK and non-CK circuits, making the selection process hassle-free. These bulbs prioritize reliability with efficient heat management, ensuring the longevity of critical components like circuit boards and LED chips. Upgrade to Morimoto's XB LED Bulbs for a brighter, safer, and more reliable driving experience in 2023!


  • Brightness: 30W power for brilliant illumination in turn signals, parking, brake, and tail lights.
  • Resistor-Free: Prevents hyper-flashing without extra components, ensuring consistent performance.
  • Compatibility: Works with both CK and non-CK circuits, simplifying your buying decision.
  • Heat Management: Integrated fan keeps vital components cool for long-lasting reliability.
  • 2023 Innovation: The latest in LED technology for a brighter, safer drive.


  • LED Bulbs: 2x (One Pair) 4257 Morimoto XB LED Bulbs


This Morimoto product includes a 2 Year limited warranty, serviced and supported by the Morimoto team in Atlanta, GA. This warranty does not cover modifications, alterations, or misuse. For additional information, Click Here.


  • Voltage Range: 10-18V DC

  • Current: 2.3A @ 13V DC

  • Luminosity: 1,680lm (raw, each)

  • Wattage: 30W

  • LED Chip Count: 52x 3030SMD

  • Lifespan: 2000 hours



  • Cross Compatibility: 4257

  • CIRCUITS: CK and Non-CK Specific

  • FITMENT: Signal, Parking, Brake, Tail, and Reverse Lights

  • TURN SIGNALS: No need for extra resistors (hyperflash-free)

  • NOTE: Not Compatible with PWM DRLs


Let's Face it: So many modern vehicles are still using incandescent bulbs in their turn signals, parking lights and brake lights that the world just isn't quite ready to move on from plug n play LED Bulbs. Despite that, the category has been stagnant for years with little to no real innovation or upgrades... until now. The new XB LED Bulbs are a much-needed refresh in this category and are all new for 2023!

Unbeatably Bright: The 4257 XB LED bulbs are great for turn signals, parking lights, brake lights, and tail lights, brake, and tail lights. With 30w of power, they are incredibly bright too, making for an instant upgrade in performance, style, and safety no matter where you put them to use.

Resistor-Free: The XB LED bulbs do not need any extra resistors and they won't cause any hyper-flashing on your turn signals either! Unlike other "resistor-free" LED bulbs that have been on the market for a while now that dim down and start hyper-flashing within a minute or two, these will maintain their resistor-free nature AND their intensity for well over 30 minutes, all without any overheating or reliability issues.

CK or Non-CK: These bulbs are conveniently compatible with both CK and non-CK Circuits, so there's no need to take a multi-meter and a friend out to your truck just to ensure you're buying the right version. The electronic system is universal for both.

Heat Management: is crucial for reliability when it comes to anything LED. High wattage means high surface temperatures, but the integrated fan works well to keep hot air away from the internal cavity of the bulb. The XB LED Bulbs do a great job at keeping the critical components such as the circuit board and LED chips cool, and therefore reliable.

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