Porsche 996 997 (99-08 Non-turbo) Intake Cleaner (x1) OEM Mahle Engine Air Filter NOTE: not for Turbo. Fits Carrera, C4, and C4S. NOTE: Carrera 4 fits 1999-2001 and then 2006-2008, NOT for 2002-2005 Porsche part# 996 110 131 52, by MAHLE-KNECHT (OEM). Please see FITMENT CHART below, under PRODUCT DESCRIPTION.