I replaced the stock sealed beam lights with Hella lenses and Piaa H4 bulbs. The total cost was about $200 and took about 2 hours to complete. You have to remove the entire headlight assembly. After you install everything you will have to adjust the lights. I have images of the parts you will need below. Piaa also makes a upgrade wire harness (below) for the bulbs. I didn't use it. I purchased the lenses and bulbs from a local speed shop. You can also get the bulbs online from www.sportscar-parts.com.