These performance exhausts are made in 2.25"/57.1mm pipework and fit from the catalytic converter section backwards (Cat-back) these parts replace the centre and rear sections.
The resonated exhaust option includes the centre silencer and has a subtle but sporty tone. This part however, is 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.