Fitment Information Infiniti Q50 3.0T RWD & AWD (2016, 2017, 2018, 2019, 2020) All Models, including Red Sport Infiniti Q50 3.7L RWD & AWD (2014, 2015  This exhaust for 3.7L will have an aggressive and loud exhaust note. Specs & Features HP Gains: 10WHP TQ Gains: 10WHP Style/ Description: Single Tip / Dual Exit  Tip Diameter: 4.5 Inch Pipe Diameter: 2.5 Inch Piping Material: T304 Stainless Steel Tip Finish Options: Polished or Burnt Tips Installation Details: Bolt-On Application Additional Notes Includes:  4x Gasket (Type A) / 8x Bolts / 8x Nuts Emissions Compliance This is a catback exhaust and does not alter, replace, or modify any emissions equipment Product Description Dynamic, Tuned, System The ARK "GRiP" exhaust system provides the serious enthusiast a combination of sound, style, and quality craftmanship. As a leader and innovator in aftermarket exhaust systems, ARK are highly recognized for their exclusive designs, proven HP/Torque performance gains, and their significant ARK exhaust note sound that is resonant, pure, rich, and deep. All ARK exhaust systems are constructed with only high quality premium materials using state of the art equipment and technology.At ARK Performance they invest most of their time in research and development in such areas as exhaust gas flow, piping size, back pressure, inner core structure, fitment and sound by their finest engineers in the automotive industry. With their passion, dedication, experience and knowledge about cars, racing, and lifestyle, ARK bring you the finest in aftermarket exhaust systems. Science of Sound The harmony of the signature ARK Performance mufflers with Helmholtz technology provides all the best sounds while leaving out the drone. Designed to Flow Beautifully crafted mandrel bends and x-pipe provide a true and even flow that is hard to match anywhere else. The Finishing Touch Each exhaust system comes with tip finishes and options that provide that perfect accent to any vehicle.