This Astra VXR performance exhaust is made in 3"/76.2mm pipework and fit from the catalytic converter section backwards (cat-back) these exhausts replace the centre and rear sections.
The resonated sports exhaust provides only a subtle increase in volume over standard as it includes a centre silencer. It is however, also available as a non-resonated version which is a louder option as it excludes the centre silencer and therefore, has a sportier exhaust note.