As most NA miata owners will say the stock headlights leave a lot to be desired, there are many companys making the housing for the H4 bulbs, eBay carries a Few, and most of the vendors carry a kit. I went with the Flyin Miata Kit, Link

Installation was a piece of cake, with the headlights popped. 4 screws remove the plastic cover around the standard headlight. 4 more remove the top portion.

Compare the stock bulb to the new housings


Made the front end look newer.

My pictures of the light patterns didnt turn out, i will charge my real camera and get some new pics of the h4's. i shattered the old sealed beams

 

Did the same upgrade on both my cars.Hella on the Celica and Bosch on the Miata. They're a big improvement from the stock sealed beams. The high beam is a little high on both but I never use high beams anyway.

 

did you adjust them at all?

 

Yup first thing I did after installing them, got some masking tape and found a level surface with a wall. Just like here http://www.danielsternlighting.com/tech/aim/aim.html

The problem is I think the beam separation is too large. So if I aim them down more then the low beam is too low, high beam is perfect. If I adjust the low beams to spec than the high beam is too high. Again not a big problem for me since I barely use high beams but for someone that uses both a lot it might be annoying. I've read that Cibies don't have that problem, but those are more than double the price.

 

did you try changing bulbs? maybe the standard bulb used by fm is the problem.

 

youre not used to the european light pattern. look at the difference in the glass, they project the light differently, much differently.