For the person who is looking for a complete Header-back dual exhaust system with an aggressive tone. With easy fit in mind, these systems are mandrel bent for maximum performance and include specially selected mufflers. This America Thunder system delivers an aggressive interior and exterior tone and is suited to the enthusiast who wants their performance to be heard. Like all Flowmaster systems, the benefits include improved throttle response, power and mileage. Designed for an easy fit, these systems include all necessary parts and hardware for easy installation. Note, requires the use of a double hump cross member.Features: Mandrel Bent Stainless Steel Tubing Limited Lifetime Warranty Aggressive And Powerful Exterior Exhaust Tone Includes Hangers and Hardware For Easy Installation Header Back System Dual Out Rear Exit Dyno Tuned for Maximum PerformanceProduct Description: '78-'88 GM A-Body and G-Body V8, Header-Back System, Incl. Scav.X-Pipe, Hardware, 2.50" mandrel bent tailpipes, Super 44 Series Mufflers, 3" Polished Stainless Tips, American Thunder, DOR, 409 Stainless Steel (Requires the use of a "double hump" crossmember)Pit Stop USA offers Flowmaster American Thunder Header Back Dual Exhaust System - 1978-88 GM A-Body/G-Body V8 817457 at low everyday prices. Be sure to check out all our products from Flowmaster including Flowmaster Chevrolet Chevelle Exhaust Systems, Flowmaster Chevrolet El Camino Exhaust Systems and Flowmaster .