The bulbs have about an inch of space. However the install was kind of tricky. You have to make two slits creating an x on the back of the headlight boot. First you take the retainer off of the light. install the retainer as if you were installing a regular bulb. then you push the headlight into the boot, plug everything in and then push the bulb in to the retainer clip and turn clockwise. The fan should be outside of the boot. On the left side (1st attempt) I managed to fit the rectifier box thing into the boot with A LOT of work however on the right side I said f-it and put the rectifier thing on the outside of the boot. If I were to install them again it would take 5 mins however I spent like a half hour trying to figure out how I wanted to do it. I forgot my phone at work yesterday so Ill post up some pics tonight of everything.