This bulb is known as a position light. This illuminates a light housing, it doesn't really serve as a driving light. Comes with one bulb, order as needed.
Fits the following models:
1999-2004 Boxster models with Xenon Litronic Headlights.
2006-2008 Cayman models - All models, fits in the bumper fog light housing.
1999-2001 Carrera models with Xenon Litronice Headlights.
2002-2004 Carrera models - All models, including Turbo, GT2, & GT3.