DESCRIPTION
FEATURES & BENEFITS
- Elevated Driving: GTR Ultra i-LED Bulbs redefine your driving experience.
- Advanced Optics: Project intense light forward, reflect over 50% backward for superior visibility.
- Hassle-Free Brilliance: Resistor-free design ensures easy installation without sacrificing power.
- Vibrant Colors: Choose from White, Red, Amber, or dynamic Switchback.
- Universal Fit: Seamlessly integrate into any headlight or taillight housing for enhanced style.
WHAT’S INCLUDED
LED Bulbs : 2x (One Pair) GTR Ultra Indicator-LED Bulbs
Wiring : 2x 3156/3157 Plug and Play Inputs
Hardware : 4x Gaskets, 1x Torx Tool
Optional Hyperflash Adapters : 2x (One Pair)
WARRANTY INFORMATION
This warranty is only valid if the item is purchased from an Authorized Dealer, Click HERE for a list of unauthorized dealers.
TECHNICAL SPECIFICATIONS
Intensity : 800lm (Amber), 850lm (White), 420lm (Red)
Input Voltage : 9-24V DC
Current : 260mA-2.1A (Red, White, Amber Models), 1.3A (Switchback Model) @ 12V DC
Light Source : 9-12x Proprietary SMD
COMPATIBILITY
CK Style Sockets : Compatible with optional CK Input Sockets
Cross Compatibility : 3156, 3157, 3057, 3155, 3156, 3357, 3457, 4057, 4157
FITMENT : Signal, Marker, Brake, Tail, Reverse Lights
INSTALLATION DOCUMENTS
New Benchmark: When it comes to high performance LED Bulbs; the numbers game is simply an excuse for a lack of engineering, and GTR Lighting isn't here to play that game. The i-LED bulbs from GTR Lighting are here to win, and when you see them next to the aging competition, you won't worry much about the numbers.
Ultra Optics:The optical system on the i-LED bulbs is highly effective at maximizing output. It projects a considerable amount output forward to provide a vivid taste of intensity up close, but more importantly it reflects more than half of the output backwards onto the surrounding reflector of your head/tail light --which is what drives intensity when viewed from a distance.
Resistor Free: Make no mistake, these are still extremely powerful bulbs. The i-LED consumes nearly the same amount of power as the original incandescent/halogen bulb, which conveniently makes them resistor-free in many applications too. We do however recommend the optional plug-n-play modules for the most reliable hyperflash-free fitment into any position that acts as a blinker, regardless of application.
Applications: The GTR Ultra i-LED is available in a pure White, Red, PC Amber, and White/Amber Switchback. Their universal collar fits any headlight or taillight housing, making them the perfect solution for those who are unwilling to compromise on intensity from their turn, brake, tail and daytime running lights.
i-Driver: The intelligent LED Drivers have been tuned to maximize intensity without compromising in the reliability department. The high-output mode is over-driven for < 2 sec to maximize initial intensity, before ramping down to a more conservative drive rate that the system can handle long term.
Style, Even During the Daytime: Don't forget about the fact that everybody still see whats inside of your headlights during the daytime, even when they're un-lit. The GTR i-LED looks superior compared to everything else out there thanks to the fact that you cannot visibly see the LED chips directly. All you see is the business end of the bulb, with its mirror perfect, crystal clear optics protruding out of the anodized aluminum base. Perfection.
3157: GTR i-LED Ultra Turn Signal Bulbs
Take your vehicle’s lighting to the next level with the GTR Ultra i-LED Turn Signal Bulbs—the brightest 3157 LED bulbs on the market. Designed to outperform and outlast, these bulbs use precision-engineered optics that push intense light forward while reflecting over 50% backward—maximizing visibility from every angle.
Built for serious performance, the GTR i-LEDs offer a resistor-free design for true plug-and-play installation. Whether you're replacing dull stock bulbs or stepping up to Switchback functionality, these LEDs integrate seamlessly with your vehicle’s factory housings and wiring.
Choose from a full range of vibrant output colors—White, Red, Amber, or Switchback (White to Amber)—to match your build and application. Ideal for turn signals, brake lights, DRLs, and reverse lights, these bulbs deliver modern performance without flicker, hyperflash, or hassle.
Engineered with quality components and backed by proven reliability, GTR Ultra i-LEDs are the gold standard in 3157 LED upgrades.
Why Choose GTR i-LED Ultra 3157 Bulbs?
- Unmatched brightness with forward and backward light projection
- No resistors needed—plug-and-play performance
- Available in multiple output colors including Switchback
- Compatible with any housing using 3157 or 3156 sockets
- Includes gaskets and tools for secure, hassle-free install
People Also Ask
Q: Are 3157 and 3156 bulbs interchangeable?
A: Yes—3157 bulbs are dual-filament while 3156 are single-filament, but GTR i-LED bulbs are designed to be compatible with both socket types.
Q: Will these bulbs cause hyper flashing?
A: In most vehicles, no resistors are needed. For vehicles with sensitive CANBUS systems, optional hyperflash adapters are available.
Q: What are switchback LED bulbs?
A: Switchback LEDs change color depending on function—white for running lights, amber for turn signals—offering style and safety in one solution.
