The biggest difference I found on my TF when changing the audio system was the tweeters, I wanted OEM look and could not find aftermarket ones to fit without a lot of bodging. However MG Rover did offer upgraded tweeters from Harman Kardon that are a straight fit. Just twist the old ones out of mounting , plug in HK ones and twist back in. Only 30 seconds per side. They were OEM on Rover 75. Part No XQN100210 

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