Fitment Information Infiniti G37 Coupe (2008, 2009, 2010, 2011, 2012, 2013) Emissions Information This is a catback exhaust and does not alter, remove or replace any emissions equipment. Specs & Features Material: Stainless Steel Includes: All hardware and gaskets Install: Bolt On Pipe Size: 60mm Tip Size: 110mm The Invidia Gemini Exhaust takes quality, performance and looks to a new level.  One of the nicest exhaust systems we have seen and heard, the Invidia Gemini Exhaust features smooth mandrel bent piping, top quality stainless steel, and CNC flanges that stand up to heat and don't warp. This exhaust is unique in the sense of giving your car that deep and clean modified sound, but really opening up once you floor the throttle.  The exhaust isn't loud, but deep and clean and brings out the natural harmony of the engine.  Our customers have said this exhaust is one of their favorite for sound, fitment and quality. Invidia Exhausts from Redline360.com come with everything you need for a bolt on install.  We include all necessary hardware, bolts and gaskets as needed for your application. Invidia Gemini Exhaust Features: Direct bolt on exhaust Mandrel Bent Stainless Steel CNC Machined Flanges Beautiful Exhaust Note