The all new Hush Thrush™ Super Turbo™ mufflers provide that vintage sound you love with the performance you expect. The improved tri-flow design of the Hush Thrush™ Super Turbo™ enhances flow and performance. Available in today s most popular sizes all mufflers are reversible for maximum installation and flexibility. The Vintage Sound Today s Power™ of the Hush Thrush™ Super Turbo™ makes it the perfect choice for that classic hot rod and today s muscle car.Specification Heavy Gauge Steel Shell Construction For Maximum Durability Straight-Through Design For Maximum Exhaust Flow And Power Smooth Flowing Perforated Center Tube Minimizes Turbulence Continuous Roving Fiberglass Technology For Powerful Tone And Long Life Expandable AKDQ Bushings Shape - Round Inlet Position - Center Color - Red Material - Steel Internal Constru