ISR Performance - Single GT Exhaust - Infiniti G37 Sedan (IS-GT-G37SDN)ISR Performance Single GT exhaust is a y pipe back exhaust system made of mandrel bent stainless steel to ensure the highest reliability and quality. This Single exhaust gives you all the advantages of unrestricted flow to maximum horsepower while retaining a deep and aggressive exhaust tone. This single GT exhaust is the perfect combination for both naturally aspirated and forced induction applications. Features: Provides a deep and aggressive