Why do I need an LED-Compatible flasher?
Regular (stock) flashers exhibit one of two common problems when you change turn-signal bulbs from regular incandescent bulbs to LEDs: Either the LED bulbs will stay on all the time when you turn the turn-signal lever, or the stock flasher will flash very fast (about twice the normal rate), also known as Hyper Flashing. By replacing your stock flasher with an EF32RL, both problems are fixed.
The EF32 is the most popular LED-compatible turn-signal flasher around, and there's a number of really good reasons for that:
The units fit a standard 2-prong flasher socket.
Unplug the stock flasher from the socket, then insert the EF32 into the socket. The official standard is that the power comes into the flasher on the X-prong of the socket, and leaves on the L-prong (X = Battery, L = Lamps).