I ordered ONE kit as described earlier in this post and it has the parts to do two headlights. You only need one kit.

As far as cleaning the inside....mine are still cloudy or spotty on the inside. No way to fix without separating the plastic housing and getting inside. I used 99.99% methanol from a local mechanic - $3.00 a gallon and he removed it from a 55 barrel drum - verified it was pure. It did not resolve the inside problem. I have had the seal kit on for 6 months but that is not going to fix the condition that I see on the inside of the lens.

I need to find someone that can open up the lens for me.