Invidia HS09IFXGIS Gemini Cat-Back Exhaust System with Stainless Steel Rolled Tip for Infiniti FX35/FX37 2009-Up Infinity FX35/Fx37 2/4Wd Gemini Rolled Stainless Steel Tips Cat-Back Exhaust Piping diameter: 60 millimeter Tip size: 110 millimeter