The R22 wheel is not shown on the web site but every wheel there is described as cast alumium, one piece. They don't look like one piece wheels. All weigh in around 27 pounds, about what you'd expect for cast.
Are you sure the R22 is forged and not cast?
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'16 F30 340i xDrive 6MT Melbourne/Black
'08 E92 M3 6MT Jerez/Speed Cloth
'18 F80 M3 6MT SO/CSAT
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