Axle-back System fits C5 including Z06 Models · Cat-back System (includes X-Pipe) fits C5 including Z06 Models · Straight-through 2.5", nonrestrictive system design maximizes airflow, improving performance and fuel economy. · Mandrel Bends and design deliver airflow increases up to 47% vs. stock · Average increase of up to 10HP and 11 ft-lbs. of torque · CORSA's Patented RSC™ Technology allows us to acoustically style the sound of your Corvette to give you the true voice of performance without the annoying drone while cruising · Dual rear exit features Twin 3.5" Pro-Series Stainless Steel Tips · All components, even clamps and hangers, of the system are constructed of premium grade, 304 Stainless Steel to ensure the look and sound of your CORSA system that won't change over the life of your vehicle · Proudly designed, engineered and manufactured in Berea, OH, USA · Quickly enjoy the CORSA sound with an easy bolt-on installation. No welding needed and all hardware and detailed, full-color instructions are included · 50-State emissions legal · Limited LIFETIME warranty for as long as you own your vehicle · Constructed of 100% Stainless Steel this Indy System has an aggressive sound for the one who is looking for a louder tone than the standard Touring edition. Comes with 4 polished Pro Series slant cut tips. 8-10HP gain.