Fitment Information Infiniti G35 Coupe (2003, 2004, 2005, 2006, 2007) Emissions Compliance This item does not modify or alter the emissions system.  This item simply allows a Nissan 350Z Catback exhaust system to attach to an Infiniti G35 since the 350Z exhaust is around 8" shorter. Specs & Features Designed to allow you to install a Nissan 350Z (03-08) Exhaust onto your G35 Coupe RWD. 8" Extension Piece Top Speed Pro 1 has been known for its popular exhaust systems due to the unique sound, excellent fitment, high performance and awesome looks.  These exhaust systems are designed to provide the smoothest exhaust flow from their enlarged mandrel bend piping which increases horsepower and torque.  Each exhaust features a unique Top Speed muffler to provide a distinct modified sound and quality flanges and hangers for great fitment.