Important Notes: This harness is designed to work with fog lights that have H11 bulbs. If your aftermarket Mustang fog lights use H10 bulbs, make sure to select them from our drop-down menu. If you're mounting a set of OEM Mustang GT LED fog lights onto your Mustang V6 or BOSS 302, then you'll also need Starkey's H11 to LED Converter kit for proper installation and function.