Rather than go with some blue light bulbs (do you really think someone will see your blue bulbs and think "Wow, it looks like an intrepid but it must be a european sports sedan!"?) why not look at upgrading the parts that matter, the bulb itself and more importantly the wiring leading to it? I haven't checked the intrepid yet, but on my other vehicle (also an early chrysler) the headlight wiring goes from the distribution block, to the switch, to the lights, with long runs of wire and a switch inadequate to flow the necessary current without too much resistance. This leads to a substantial voltage drop at the headlight itself. I installed a wiring bypass which uses a heavy guage fused wire going directly to the battery, through two relays, each activated by the original wiring, to the headlights. High and low beam each have a separate relay. The entire wiring harness was inexpensive, or if you're that cheap you can make your own, and works very well. This combined with some upgraded bulbs makes the stock headlight housing work as well as they can.
whodat