The original Flowmaster 42541 Series 40 Chambered Muffler delivers an aggressive exterior and interior tone. If you're looking for that original Flowmaster sound, this is the muffler for you. Constructed of 16-gauge aluminized steel and fully MIG-welded for maximum durability.• Durable, fully welded 16-gauge aluminized steel• Aggressive sound exterior exhaust tone• Noticeable interior resonance• Excellent street/strip applicationSpecsBody Dimensions: 4"H x 9.5"W x 13"LBody Material: Aluminized SteelInlet Connection: Slip-FitInlet Inside Diameter: 2.5"Inlet Outside Diameter: 2.63"Muffler Overall Length: 19"Inlet Location: OffsetOutlet Location: CenterOutlet Inside Diameter: 2.5"Sound Level: AggressiveFit: UniversalVehicle Type: Muscle Car, Street/StripPart Number: 42541 Fully MIG-welded for maximum durability Excellent street / strip application