K03 Turbo Charger (Golf Jetta Gti 1.8t) Stock Replacement Product Details K03 turbo charger (1.8T ) Volkswagen Jetta / Golf 01-05 direct bolt on for 01-05 ( 2001 2002 2003 2004 2005 ) Jetta / Golf 1.8T This is a aftermarket turbo but this turbo has the same specifications similar to the factory turbo. (replacement of brand new factory oil line is require changing to this turbo charger )