Question about Heads
So I've been doing a lot of research and have been trying to figure out what kind of heads to get. Honestly, I don't really know the difference between many of them. Some say they're not for street use, others say they're not street legal, etc. Moreover, the whole stage 1, 2, and 3 thing. I'm extremely confused! Can someone please help me out with this? I don't even know where to start!
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