I have the 3157 LED bulb in my truck. You definitely need a resistor or turn signal will hyper flash as mine does now. I am hoping to find a stock resistor to plug in, thinking maybe Infinity might use same type.
You just need to find out which model number the bulb is, and then do some web search for " XXXX Led equivalent"
It will eventually lead you to the right bulb, then search out the ones with built in fan.