In fact, there are very few "royal modification factories" in the true sense. AMG is no exception. Now it has become an independent department of Mercedes-Benz, so there is no need to talk about the "Queen Tuning Factory". Saying this just makes LZ realize that there are relatively few real "Queen tuning factories". Now the "Queen brand" is actually just a "professional" modification for this brand, not the "Queen" we think of. The ones listed below in parentheses are his independent modification department, the ones in quotation marks are "Queen" and the others are other modification brands. BMW: (M-TECH), ALPINA, AC Schnitzer, HAMANN, ALPINA. Mercedes-Benz: (AMG), BRABUS, VATH, CARLSSON. Volkswagen/Audi: "ABT", MTM. Porsche: GEMBALLA, RUF Yellow Bird, STROSET. Toyota: (TRD), "TOM'S", SARD. Nissan: (NISMO), "IMPUL". Honda: "MUGEN Unlimited". Subaru: "STI". Mazda: "MAZDASPEED", RE Amemiya. Ferrari: KOENIG. Volvo: HEICO. SAAB: RINSPEED.