Some sellers are claiming these new D4R bulbs are a direct replacement for the current D2R housings, and do not require any modification. Can anyone here confirm this? Moreover, has anyone used the newer D4R bulb, and can confirm it’s really better and warrant the upgrade?

thanks.


Example:
http://cgi.ebay.com/ebaymotors/TWO-N...57019810QQrdZ1

 

d2r and d2s have different base, but some aftermarket companies they just make a base that will fit both d2r and d2s, it's very simple

i talked to vicetran before, he said d4r are different, but personally i havent' see any pics. but who knows maybe some company makes some bulbs that will fit in all (if they are different)?

 

I dremmel the headlight notch, it will fit both now.
mine is retrofit, did that when installing projector.

D4r, i heard is brighter, not by much though. the new GS comes with it.
dont know if it would fit D2 ballast socket,

 

Yeah, I was wondering if the ballast is the same.

 

the stock lexus ballasts will not work(unless it's from the new GS or IS). it will fire the bulb up initially but will turn off after a few seconds because the D4's run at a lower voltage. The only D2 ballasts that i know works with the D4 bulbs are the hella Gen 3 and 4.