1157: GTR i-LED Ultra Turn Signal Bulbs

The GTR Lighting Ultra i-LED was engineered for drivers who care about real-world performance—not inflated lumen ratings. Instead of focusing on marketing numbers, GTR developed an advanced LED bulb that delivers exceptional brightness, superior optical efficiency, and a refined OEM-inspired appearance.

Whether you're upgrading your turn signals, brake lights, tail lights, or daytime running lights, the Ultra i-LED offers outstanding visibility and premium quality in every detail.

Advanced Optical Design

The secret behind the Ultra i-LED's performance is its precision-engineered optical system.

Rather than sending all of its light straight forward, the bulb strategically directs a large portion of its output back into your factory reflector. This allows the housing to distribute light more efficiently, producing greater intensity and improved visibility from every angle while maintaining excellent close-range illumination.

The result is a brighter, more effective lighting upgrade that works with your factory optics instead of against them.

Intelligent Power Management

Each Ultra i-LED features GTR's advanced i-Driver technology, designed to maximize brightness while protecting long-term reliability.

When first activated, the bulb briefly operates at increased power to produce maximum initial brightness before automatically settling into an optimized operating level that controls heat and promotes extended service life.

Simplified Installation

Thanks to power consumption similar to many factory incandescent bulbs, the Ultra i-LED operates without external load resistors in numerous applications.

For turn signal installations that may experience hyperflash, optional plug-and-play anti-hyperflash modules are available to ensure reliable, error-free operation.

OEM+ Appearance

Performance isn't the only upgrade.

Unlike conventional LED bulbs that leave the LED chips fully exposed, the Ultra i-LED conceals its emitters behind crystal-clear precision optics. Combined with its premium anodized aluminum construction, the result is a clean, factory-inspired appearance that looks as impressive during the day as it does at night.

Available Colors

Choose the perfect configuration for your application:

• Pure White
• Red
• PC Amber
• White / Amber Switchback

The universal collar design makes the Ultra i-LED compatible with a wide range of factory headlight and taillight housings.

Perfect For

• Turn Signals
• Brake Lights
• Tail Lights
• Parking Lights
• Daytime Running Lights (DRL)

Features

• Precision optical lens technology
• Reflector-enhancing light distribution
• Intelligent i-Driver electronic control
• High-output startup mode
• Automatic thermal management
• Resistor-free operation in many applications
• Optional plug-and-play anti-hyperflash modules
• Premium anodized aluminum housing
• Hidden LED chip design for a clean OEM-style appearance
• Available in White, Red, PC Amber, and White/Amber Switchback
• Universal fitment for numerous automotive lighting applications

Technical Specifications

• 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

What's Included

• LED Bulbs: 2x (One Pair) GTR Ultra Indicator-LED Bulbs
• Wiring: 2x 1157 Plug and Play Inputs
• Hardware: 4x Gaskets, 1x Torx Tool
• Optional Hyperflash Adapters: 2x
• Warranty: Lifetime Limited (Click for Details)

Compatibility

• Cross Compatibility: 1157, 1016, 1034, 1076, 1130, 1152, 1154, 1158, 1493, 2057, 2357, 2396, 2397, 3496, 7225, 7528
• FITMENT: Signal, Marker, Brake, Tail, Reverse Lights

Installation Guide

Product Video