Downpipe designed for: PORSCHER PANAMERA 971 2013-2018 3.0 Diameter of the inlet (internal): 76 MM MM Symeter (internal): 140 MMD diameter (external): 78 MMDnownpipe Turboworks company, is made of 100% from the noble stainless steel.downpipe has a 200cell catalyst and thermal shield.Downpipe designed for: 2015-2017 Audi A3 Quattro 2.0T 2015-2017 AUDI S3 2.0T 2015-2017 VOLKSWAGEN GOLF R 2 MPPIPE has an external diameter 3 '' (76mm) .downpipe turboworks, is made in 100 % from precious stainless steel.