Downpipe by TurboWorks, made of stainless steel. Downpipe for: 1999-2004 Volkswagen Jetta / Bora 1.8T FWD 1999-2004 Volkswagen New Bettle 1.8T FWD 1999-2004 Volkswagen Golf MK4 1.8T FWD Dimensions: Turbo outlet - 3 "(76mm) ) Center Part - 2.5 "(63mm) Adaptation Part for Series Exhaust - 2.25" (57mm) To keep the full diameter of a non-series exhaust, the adapter must be removed. For dimensions, see photo.Downpipe by TurboWorks, made of In order to maintain the full diameter of the non-standard exhaust, the adaptation part should be removed. Dimensions are shown in the photo. Downpipe for: 1999-2004 Volkswagen Jetta / Bora 1.8T FWD 1999-2004 Volkswagen New Bettle 1.8T FWD 1999-2004 Volkswagen Golf MK4 1.8T FWD Dimensions: Turbo Outlet - 3 "(76mm) Middle Part - 2.5" (63mm) Conversion Part for Serial Exhaust - 2.25 "(57mm)