Fitment Information Infiniti Q50 Sedan ONLY works with Infiniti Q50 Sedan VQ37 or VR30 Emissions Compliance This is a catback exhaust and does not alter, replace, or modify any emissions equipment. Specs & Features Provides a deep and aggressive exhaust tone Lighter then factory exhaust  Precision TIG welded Stainless Steel Brushed Stainless finish  Polished tip and muffler 3" exhaust with 4.5'' muffler tip  What's Included? 1x Resonated Front Pipe 1x 3'' Muffler section with 4.5" tip 2x 2 Bolt 3" Exhaust gasket  4x Bolts 4x Nuts  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.  Redline360 sells only new, genuine and authentic ISR products.