Insert a handheld plumbing snake into the pipe if the hose didn’t function. When the water wasn’t strong enough to dislodge the blockage, you’ll have to eliminate the clog manually. You'll be able to moan all you would like about the C8’s wholesale abandonment of nuance, but this was inescapable. https://acceleratepost.com/downpipe-rs6-c8-unleashing-performance-and-sound/