Opera Modular The Opera Modular is engineered to enhance the style and performance of today's luxury and high performance street vehicles, through the use of racing inspired technology. The Opera's beautifully sculpted five-spoke design is accented by striking titanium fasteners custom manufactured for O.Z.. These wheels are assembled at the very same facility used to produce O.Z. Racing's legendary Magnesium race car wheels used by the worlds leading Formula one and CART teams. Designed with today's larger luxury cars in mind, the Opera is available in 17" through 20" diameters for most of today's premium luxury automobiles.