Had Xentec’s in the GTO low beams. First set was dead after 2 days. Ebay seller shipped a new set of ballasts no questions asked. They started going out over bumps after being installed about 6 months. Verified it wasn’t a loose wire anywhere then tossed the whole thing in the trash and went back to my factory lights. Not worth dealing with warranty swaps on some shitty product every 6 months or so, especially on something as critical as my low beams.