Mahle "Gas Burner" (NOS) front, back, and detail photos showing part number and size stamps. This wheel was offered by Porsche, made by Mahle (who made other wheels for Porsche, as well).
It is the lightest wheel offered from the factory, and is described in the factory parts manual as: E901 361 017 00, perforated disc wheel, aluminum, die casting, 5 1/2J X 15 ET 42, Lacquered (42mm offset, PN 901.361.017.00)
– Bruce Robertson