They fit perfectly and are much brighter than original bulbs. Installation only took about 2 minutes per light. I am very happy with these units, will improve their durability over time. Useful tips below. The main trailer headlights that come with most vans do not have mirrored reflectors like cars. Fix this by using a few inches of 3M 3340 aluminum foil tape (see pictures) to reflect part of the tail light. Chances are your RV marker and taillights aren't sealed, while replacing them apply a small amount of Permatex 22058 Dielectric Adjustment Grease to the lamp contacts. This will prevent corrosion and lamp failure due to corrosion in the future.
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