Just completed replacing our four #9004 halogen headlight lamps with Super Bright #9004-HLV5 LED lights. They look to be twice as bright
and don't cause the dash mounted voltmeter to indicate in the red when the headlights are on. Our 1991 #277 coach has Ford truck headlights and turn signal housings.

In order to mount the new LED lights, you must trim the plastic headlamp retaining to a maximum width of 0.9125". Remember to trim the back of the retaining ring. The narrower ring allows