Gibson Performance Exhaust 55189 Aluminized Superflow Universal Muffler 4 x 9 x 18 in. Oval Body; 3 in. Center Inlet; 2.50 in. Dual Outlet. Deep Powerful Sound Chambered and Louvered Design, No packing, No Baffles or Weak Deflectors Minimal Interior Drone, Reversible Limited Lifetime Warranty