Magnaflow Exhaust Install I purchased the V8 5.7L GAS4 x 9 x 14in. Dual Mufflers, 2.25/2.5in. System, Dual 2.5in. Polished Turn Down Tips, Models Originally Equipped with Side Pipes, DUAL REAR EXIT, part #16842Features and Benefits: Lifetime Warranty, Dyno Tested And Proven To Make Power, Performance Gains In Horsepower And Torque, Great Sound -Has A Smooth; Deep Tone, Easy To Install, Mandrel-Bent. All Welded. Built To Last.Because this system is made for 68-73 cars that did not have tail pipe cutouts I new I would have to do some modifying to it.First I removed the old system. It is a stock 2" pipe that I added the H-pipe to.