Gibson 55114S CFT Superflow Dual/Dual Oval Muffler - 4x9x18in/3in Inlet/3in Outlet - Stainless. ManufacturerPart : 55114S. Gibson CFT Muffler actually tunes your exhaust by using resonance chambers, directional louvered tuning ports and angular induction to draw exhaust gases into the muffler and expel it at a higher velocity.
