Add power and sound to your Infiniti Q50 or Q60 with this Twisted Steel upper and lower down-pipe exhaust system which produced up to +16 HP and +23 lbs. x ft. torque gains on our in-house dyno. This system includes high flow 400 CPSI primary cats and the upper and lower down pipes are made with 3" mandrel-bent, brush finished 304 stainless steel tubing for optimum flow for increased gains and stellar appearance. This modular design down-pipe system features a v-band machined flange connection to the factory turbo, utilizes stock mounting locations and includes mounting hardware for a direct bolt-on that requires no cutting or drilling for a hassle-free installation. Twisted Steel 3 IN 304 Stainless Steel Street Series Front Down-Pipe w/ Cats Infiniti Q50/Q60 16-19 V6-3.0L (tt) Infiniti Q50 14-18 V6-3.0L (tt)