If the device is a specialized unit (like a car head unit) and you need to reinstall this specific firmware:
: It may be a specific filename or metadata tag for "extra quality" media content (such as high-definition video or audio files) distributed through unofficial Android apps or forums. Modified Software (Mods)
Ultimately, "extra quality" for a car head unit is measured by daily reliability. Does the unit boot within 5 seconds? Does it connect wirelessly to Apple CarPlay or Android Auto without dropping out? Does the radio tuner reject interference from the alternator?