These inserts will convert each tail light to a three-bulb assembly. Improves the brightness of your tail lights by 200%, so your rear lights will shine bright when you use your brakes or turn signals at night. These 3-bulb inserts have a drop-in design for an easy installation within the body of each tail light. All needed bulbs are included in the kit. Conversion inserts require splicing into your existing harness. Sold as a pair,