Gibson Performance Exhaust 55123 Aluminized Superflow Universal Muffler 4 x 9 x 13 in Oval Body; 3 in. Center Inlet; 3 in. Offset Outlet. Deep Powerful Sound Chambered and Louvered Design, No packing, No Baffles or Weak Deflectors Minimal Interior Drone, Reversible Limited Lifetime Warranty