BMW E31 Headlight is very easy to open and the EvoX-R can fit with minor tweaks.

BMW E31 EvoX-R Xenon beam BMW E31 EvoX-R Xenon comparison BMW E31 EvoX-R Xenon lens BMW E31 EvoX-R Xenon mount Source: MouTine on HID Planet

Order the Hella EvoX-r bi-xenon projectors here: