Upgrade 3" Stainless Steel Catback Exhaust System with 4" Tip For Honda Civic SI Coupe Warranty: Yes | Condition:New Installation Guides: No Installation Guides Included Surface Finish: Stainless Steel Polish Fitment: 2006-2011 Honda Civic SI (2 Door Coupe Model Only) Piping Diameter: 3.0" / 75mm | Muffler Tip Size:4.0"