installed a sony radio on my 2008 flht, using the retro radio kit from biketronics, and must say I am very pleased with how easy it was to install. Taking the fairing off was the hardest part. The kit just plugged into the existing connector inside the fairing. Even using HD stock speakers, and going 70 plus I don't have any problems hearing the music. Bought the system from Cycle accessories store, and did have to call them about the automatic volume control quitting after a couple of days, and was told what to do and its working fine now. Was told if I had any more problems with it, just call and they would replace it.