Stage 1 is fairly expensive and really crappy. Stage 2 is really expensive and fairly crappy.
Boom is not the way to go. Plenty of aftermarket options available that are easy to install and will sound a ton better for a lot les $$$$$.
Do some reading here and the other forum. Once your head stops spinning call Alex at bagger audio lab with your budget and goals and he'll take care of you.
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2018 CVO RG lava orange, 117 Stage 3, 14" F47 and a few chrome extras. Boom crap gone.
2016 RG Special Cosmic Blue, 120ST with Dragos 2:1 and TTS tuner, FBI drop seat kit and JNR air ride. Stock audio long gone.