For the person who wants the look of a traditional dual in system with all the benefits that a Flowmaster Cat-back exhaust system provides. D.O.R. (Dual out rear) systems are the perfect choice. Force II systems deliver a moderate exterior tone and moderate to mild interior tone, and are suited to customers looking for efficiency improvements without a lot of noise. Especially recommended for towing applications. 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.Features: Mandrel Bent 16 Gauge Aluminized Tubing 3 Year Limited Warranty Stock to Mild Exterior Exhaust Tone Includes Hangers and Hardware For Easy Installation Connects After Factory Catalytic Converter Dual Out Rear Exit Dyno Tuned for Maximum PerformanceProduct Description: 86-'90 Chev. Corvette, 5.7L, 3.00"/2.25" Rear Y-Pipe, Hardware, 50 Series Delta Flow Mufflers with 2.50" Stainless Tips (4), Force II, DOR, Mandrel Bent Tubing,16 Gauge Aluminized SteelPit Stop USA offers Flowmaster Force II Dual Exhaust System - 1986-90 Chevy Corvette 5.7L 17153 at low everyday prices. Be sure to check out all our products from Flowmaster including Flowmaster Chevrolet Corvette Exhaust Systems.