K04 KKK Turbo Turbocharger CHRA Cartridge Audi S3 TT 53049700020/22/23
5304-970-0020 (53049700020, 5304-980-0020, 53049800020, 5304-988-0020, 53049880020, 5304-998-0020, 53049980020). Follow the pipe from the air filter to the turbo - the housing the pipe attached to is the compressor housing.