This two chamber design incorporates Flowmaster's patented Delta Flow technology. The Delta deflectors generate increased scavenging for better performance and reduced interior sound. Milder exterior tone and reduced interior resonance over Original 40 series. Constructed of 16 gauge aluminized steel and fully MIG welded for maximum durability.Automotive Item Grade: High PerformanceBody Height: 4.000 in.Body Length: 13.000 in.Body Width: 9.750 in.Color: BlackFitment: UniversalInlet Connection Type: PipeInlet Diameter: 2.250 in.Inlet Inside Diameter: 2.250 in.Inlet Outside Diameter: 2.250 in.Inlet Position: OffsetInlet Type: Single OffsetMain Piping Diameter: 2.250 in.Material: Aluminized SteelMount Type: Uses New Hangers (Not Included)Muffler Series: 40 Series Delta FlowMuffler Type: ReflectionOutlet Connection Type: PipeOutlet Diameter: 2.500 in.Outlet Outside Diameter: 2.250 in.Outlet Position: OffsetOutlet Type: Single Offset OutletOverall Length: 19.000 in.Shape: OvalSound Level: AggressiveTip Quantity: 0Title: Flowmaster 942443 40 Delta Flow Muffler - 2.25 Offset In / 2.25 Offset Out - Aggressive SoundWARNING CA Proposition 65: No