...Racing Hart Japan made the Type C2, Type C5, and a few other styles circa 1998. Note theType" in front of their names. Type C2 and Type C5 are all multipiece, not single pieces. They were discontinued a few years ago.
When Racing Hart was still producing Type C2 and C5, Dazz Motorsport allegedly copied them, outsourced the manufacturing somewhere in Asia, and called them Racing Hart Evolution C2 and C5. These wheels are one piece and bear Racing Hart imprints on the caps and/or spokes. Dazz at that time also imported (they still do at this time) real Racing Hart wheels to the USA. Knowing that Dazz copied their design and used the Racing Hart name, Takechi Project (I think this company is the owner of Racing Hart, Lowenhart names and a few others) sued or threatened to sue Dazz for brand name infringement (sp).
Because of this, Dazz changed the name to RH Evolution and still markets the C2, C5, and later launched C3, S15, and so on. These are all one piece wheels and still made in Asia. It was believed that the wheels are made in Taiwan, Thailand, and China. Lately, RH Evo launched more styles and some of them are 2-pc wheels.
So in short, Racing Hart made Type C2 and Type C5, both multipiece. RH sells C2 and C5, too (without Type). The styling is very close, except RH Evo C2 and C5 don't have rivets.
It's easy to distinguish between RH Evo and Racing Hart. Racing Hart wheels will say, naturally, Racing Hart on the center caps and everywhere else on the wheels. Most if not all Racing Hart wheels are multipiece.
RH Evo will say RH or RH Evolution, except those early produced ones. Some of those early produced ones carries Racing Hart names. Only RH Evo Pro line wheels are multipiece, like J8, J5, etc. The rest is 1-piece.
Due to this confusion, a lot of wheel shops take advantage of their customers by saying that RH=Racing Hart therefore giving the false confidence that their newly purchased RH Evo rims are made by Racing Hart."