I want to buy an HID kit for my corolla but I am just wondering about some things since I have never bought them before. First, is there a big difference between the 35W and 55W ballasts. Second, is the mounting bracket really required or just an option instead of having them dangle. Third, do you think the 2010 needs the relay harness and error eliminator to work properly. any info would be great. Thanks.
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