FLOWMASTER 80 SERIES CROSS-FLOW MUFFLER, ALUMINIZED STEEL, NATURAL FINISH -- 2.5 in. inlet and outlet diameter; Single offset inlet and dual offset outlet configuration; 4 in. thick x 9.75 in. wide x 15 in. case length, 21 in. overall length; Oval casing; Chambered internal construction; This high flow muffler is engineered to provide excellent ground clearance and aggressive tone; Designed for transversely mounted mufflers behind the rear axle; Requires welding; With Flowmaster's limited 10-year warranty.