The ISR Performance ST Series Exhaust for Infiniti Q50 is a Y-Pipe Back exhaust system that utilizes a Stainless steel 2 bolt 3" flange that splits into 2 2.5" pipes with bottle style resonators and continues back to an aggressive muffler section with 4"� tips. This exhaust gives your car not only a great look but a deep tone that every enthusiast is looking for. Our ISR Q50 ST Exhaust is designed to bolt directly to the vehicles stock Y- pipes replacing the mid-pipe and factory rear muffler. 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 2 2.5" pipes with bottle style resonators Two aggressive mufflers with 4"� tips Direct bolt on Gasket and hardware included What's Included? 1x resonator section 2x Muffler Section w/ 4"tips 3x 2 bolt 2.5"� gaskets 6x Bolt 6x 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.