Winjen's are not plug in play. Some sellers on ebay will do the wiring for you, but there is an additional cost in doing so, as the LED signals will hyperflash. Usually you're own your own with wiring up to stock harness and will have to purchase a resistor to counter the hyper-flashing issue.
Having said that, if you're not retrofitting, they are probably your best bet for having usable light. I had spec-d projector headlights and they were terrible. The Winjens are much better, but they do tend to glare and aiming them is a joke (just like all the aftermarket ones). Also forget about aiming them after they're installed, unless you have tiny hands and an even smaller screw driver.