Thank you! Unfortunately, the plug and play feature is direct fitment into the factory socket. Load resistor are still required to prevent hyper blinkers. It can be installed without resistor but it will blink faster than normal. There is currently no led bulb on the market with built in resistors.Welcome!
I see you have these "3157 60-SMD 3528 LED - SWITCHBACK" listed as fully plug and play.
Do these require load resistors or are they designed and built to where the circuit does not require them?