The Denso kit
that I linked to will work in a plug & play situation. The bulb has an extra groove machined into the base that holds it correctly in the included casper shield that fits in the H4 bulb space. It comes with spade plugs to plug into the stock H4 harness. That is OK for short term but you should really buy/make a new wiring harness with relays so the ballasts are powered from the battery or you will fry your wiring (or worse) over time.
Be aware that we have a switching ground setup - meaning that the positive is always on and the ground is switched on and off. It is extremely important to get the polarity correct.