Genuine Porsche 987 Boxster & Cayman, 997 Carrera PCM Left Volume rotary knob Fits the following models:Porsche 987 Boxster 2005 - 2008Porsche 987 Cayman 2006 - 2008Porsche 997 Carrera 2005 - 2008Porsche 997 Turbo 2007 - 2009Porsche 997 Carrera GT3 2007 - 2010Porsche part number: 997-642-201-00 A05THESE ONLY FIT THE PCM MODELS AND NOT CDR MODELSTHIS WILL NOT FIT THE RIGHT HAND SIDEBox 58