PathfinderLED 3157 Ultra Flash Red Led Bulb For Harley If you are looking to add safety to the rear end of your bike but don't want to mess with a complicated modulator or wire splicing, PathfinderLED has created the Ultra Flash LED bulbs. These bulbs emit a quick series of flashes when first breaking then stay solid until the next time you apply your breaks. Give the people behind you extra seconds to brake sooner and avoid rear end collisions. Features: Red LED Fits 3157 applications Flashes when braking then turns solid Ultra-Bright Instant-Intensity LED technology 12V low voltage draw, high performance LED Direct Replacement from stock bulbs Solid-State vibration proof Rugged long-lasting design No modulator or complicated wiring required 5 Year Replacement Warranty Replaces OEM 68167-04