Markbp posted a topic in Lexus GS 300 / Lexus GS 250 / Lexus GS 430 / Lexus 450h / Lexus GS 460 ClubHi, I have acquired a brand new GS300 mk2 L/H High Intensity Discharge unit complete with all electrics, in error. What I wanted was the normal one for a 2000 GS300 SE. built 07/99. Is it possible to change it back to std HB4. Failing that I need to swap or sell it. Anyone got any ideas? Thanks in advance for any help.