Y-Pipe Opel/Vauxhall Z18XE from catalytic converter to first silencer

Gruppe A downpipe from catalytic converter to first silencer
in 2,5" (63,5mm) build of stainless steel

Opel/Vauxhall Corsa C / Tigra B / Astra G / Astra H / Zafira A / Zafira B / Vectra B / Vectra C
with engine Z18XE

Please state car type

Please specify the diameter from entering the silencer
(some manufacturers have 2.5" systems but with a smaller entrance).