Ok, I know I have seen a post explaining this B4 but both terms strangely are too short to do a search for, but anyways, I can get some bulbs 6000k but they are D4C the seller says that the fit D4S with no modification. I have no reason to not believe this guy, but I trust you guys more, can anyone help explain this to me??

 

i have seen this too on ebay and other places so im wondering the same thing

 

D4C is aftermarket universal application for D4S and D4R.

 

Thanks, so I take it that they fit then.

 

D4C is the universal version of D4 bulb just like D2C fits D2r and D2s