Quiet-Flow™ Stainless Steel Oval Aluminized Exhaust Muffler (21479) by Walker®. Muffler Inlet Diameter: 2". Muffler Outlet Diameter: 2". Muffler Body Length: 19". Muffler Overall Length: 23.5". Muffler Configuration: Offset - Centered. Together with delivering OE-style sound, the Quiet-Flow Muffler features steel construction that resists rust. This part is a perfect decision if you are looking for proper OE-quality acoustics and long service life.