For Honda Accord V6 4" Muffler Tip Stainless Steel Catback+Manifold Header Exhaust System - CG F23 6CYL Made of High Quality Stainless Steel Material TIG Welded CNC Machine Flange Increase High Flow Air and Maximize Performance; Instant Gain 10 to 15 Hp. / Tq.; Aggressive Deep Sound while Ensures Smooth Exhaust Gas Flow Catback - Muffler Tip Type: Dual Rounded Tip / Tip Diameter: 4.5" / Inlet Size: 2.25" / Main Piping Diameter: 2.25" / Removable Silencer Included Header - O2 sensor bung insertion / Inlet: 1.25" / Outlet: 2.5" / 1.75" piping diameter with flex pipe insertion