[lkchris]

Litronic headlights were only ever clear, but don't readily retrofit to a Boxster that came with Halogen headlights.

Clear turn signal Halogen headlights (from later years) easily retrofit to earlier years, but this is relevant to earlier cars also with Halogen headlights

Factory fitted Litronics have an additional electrical connection related to activating the automatic leveling feature (which was not required for Halogens).