Quote: H1 is a single hi-beam bulb, H4 has low and high beam filaments. So to replace the standard Challenger arrangement, H1's on the inside two headlights, H4 on the outside two.
Or.....do what I did and put H4's on all four, I liked the idea of having four lights on during normal driving as opposed to only on high beam.
So what is the difference between the Xenon bulbs and the H1/H4's? I am really interested in this conversion but want to sort through what is what first. do you have to modify the car at all, other than wiring?
do you have to modify the car at all, other than wiring? 