I've heard that too. Aftermarket seems the way to go which is a real shame as the PFL sports exhaust was spot on, so loud and noisy we did wonder how on earth Audi got it passed the noise regs! Audi are missing a trick imho in this new over regulated world, they should offer after market RS upgrades that don't void the warranty ... kerching!I read somewhere that the newer RS cars are quieter because Audi are already producing cars with exhausts that comply with upcoming EU regulations on noise. Not sure why they've decided to do it so early, but this is the main reason why the 4 and 5 sound a bit muted apparently. There will no doubt be plenty of aftermarket options, there are some out for the 5 already.