When used with the replacement circuit board and matching flasher works perfectly with the running lights and turn signal function. Unfortunately, the 4-way flashers DO NOT WORK with LEDs in front and back. I had to remove the front Yellow LEDs and replace them with the stock 1157 bulbs for the 4-way flasher to work. Still works well with the running lights and turn signals using the stock front bulbs. So - really couldn't use the Yellow LEDs. I'll investigate other flashers - electronic flasher from NAPA did not solve the problem.

Before install I was worried how these would look since the lens is clear. I installed them and have to say I was impressed. I don't notice them when they aren't on, they have a nice "glow" that throws the light well and you don't see the individual leds.

I'm very pleased. I'm more confident others can see my turn signals.

I installed these in my 69 Eliminator as I was upgrading the rear tail lights to the plasma LEDs. No complaints and they are nice and bright. Easy upgrade as it is just a straight bulb swap.

These globes are really bright and really add to the look of my Cougar, like having fog lights.

Probably the best LED bulbs out there!

Excellent replace for 1157 bulb and they fit perfectly

a must have when running the plasma system

I really like these plasma LED lights. I am slowly (but surely) converting all of the lights on my car to these plasma LED lights.

nice bright much brighter