Porsche recommends replacing your spark plugs every four years, or every 40,000 miles (whichever comes first). These are genuine Porsche parts in factory packaging.
Carrera, Carrera S, Carrera 4, & Carrera 4S models - 2009-2012
Boxster, Boxster S, Boxster Spyder, Cayman, Cayman S, & Cayman R - 2009-2012
New Option - If you have a 2009-2012 Carrera S with X51 Performance package, a GTS, or Speedster, please choose the X51 plugs