Huge 2.5 inch stainless mandrel - bent tailpipe. Straight - thru Monster muffler flows up to 108 better than stock. Slashes backpressure. Throaty sound. Constructed of heavy - gauge stainless steel, Banks Monster features a supersized, 2.5 inch tailpipe. Banks Monster muffler, its straight - through performance muffler, is the industry's least restrictive. In comparison tests, Banks muffler flowed 543.2 cfm at 1 psi - a 108 improvement over the stock exhaust's 260.0 cfm. Monster virtually eliminates backpressure from the catalytic converter back, for more power and efficiency - and an authoritative, yet civil, exhaust note. For maximum results, combine with a Banks exhaust manifold available for 1991 - 2001 Cherokees. Includes Stainless Monster muffler, Stainless 2.5 inch tailpipe, Mounting hardware.