The Flowmaster 71415 Flow FX Series Muffler is for the enthusiast who is looking for an economically priced performance muffler that delivers a moderate sound level and tone, both inside and outside the vehicle. The large straight-through smooth core offers up a different sound than that typical "chambered" sound that Flowmaster has become famous for. These new Flow FX mufflers have a compact 4.00" diameter round body that will fit nicely on just about any application and feature a fully welded 409S stainless steel case for increased durability.• Durable fully welded bright 409S stainless steel case• High flow straight-through design for great performance• Moderate exterior performance toneSpecsBody Dimensions: 4" dia. x 14"LBody Material: 409 Stainless SteelInlet Connection: Slip-FitInlet Inside Diameter: 2.25"Inlet Outside Diameter: 2.38"Muffler Overall Length: 20"Outlet Location: CenterOutlet Outside Diameter: 2.38"Sound Level: ModerateFit: UniversalVehicle Type: 4/6 Cyl. EnginePart Number: 71415 Large straight-through smooth core for a different sound Compact 4"" diameter round body Durable fully welded bright 409S stainless steel case | Flowmaster 71415 Flow FX Muffler