Yonaka Honda Civic 2006-2011 4DR Sedan 2.5" Performance Catback Exhaust (2.0L Si Only) Fully polished stainless steel 2.5" mandrel bent piping 3.5" stainless steel exhaust tip Quiet, clean, and deep hum, without the irritating mid range raspy sound Direct bolt on fit to OEM, all installation hardware included