FLOWMASTER ORIGINAL 40 SERIES MUFFLER, ALUMINIZED STEEL, NATURAL FINISH, SOLD INDIVIDUALLY -- 2.5 in. inlet and outlet diameter; Single offset inlet and outlet configuration; 4 in. thick x 9.75 in. wide x 13 in. case length, 19 in. overall length; Oval casing; Chambered internal construction; Produces more power than OE and competitive aftermarket products; Its unique H-chamber design helps control interior resonance while its fully welded construction adds strength and durability to last even when installed on high horsepower engines; Helps increase torque and horsepower on many late model performance cars and trucks; With Flowmaster's limited 3-year warranty.