100% aluminized coated shell for long lifeTri-flow design provides that Thrush classic sound2.25 inch inlet and outletReversible for maximum flexibilityTime proven spun lock heads for leak free sealThe 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 todays most popular sizes, all mufflers are reversible for maximum installation and flexibility. "The Vintage SoundTodays Power" of the Hush Thrush Super Turbo makes it the perfect choice for that classic hot rod and todays muscle car. Thrush has made hot rods hotter since 1966