Comparing the exhaust tone the CSS sounds far more aggressive and louder than mine, is this down to the tune being different ( bangs on upshifts, overrruns etc)? Would having the CSS front/mid muffler (resonator) help it sound louder/more aggressive?
Map, R engine/turbo, overrun, muffler. Do you just want something slightly louder than stock? Pick up the Clubsport S muffler and call it a day.
You want something more aggressive than that, you’ll have to upgrade the downpipe and resonator (to cut down on drone). You can use the Clubsport S muffler still and experiment on which downpipe/res to use or just get a turboback setup. One of the forum members here, Gti jake, makes a mean sounding turboback setup. Just don’t know how expensive it is to get shipped to the UK.
If you want the overruns, get a tune. I’m sure plenty of UK tuners out there who can make it happen. You can make it sound OEM-like, similar to the Clubsport, with some burbles or straight up like gunshots.
https://youtu.be/Sd1VJZPIFw0 - Stock Clubsport with only Clubsport S muffler changed