The MagnaFlow 4in Round StraightThrough Performance Exhaust Muffler 10434 brings our worldfamous exhaust sound and dynoproven performance to your ride in a weightoptimized 4x4x22in package with a premium satin finish The straightthrough freeflowing design of this roundbodied mufflers reversible universal 2/2in diameter inlet/outlet layout enables versatile installation options to match the spacing requirements of your vehicle Due to the cutting and welding involved professional installation is highly recommended Internally 10434 utilizes a perforated stainless steel core wrapped in stainless steel mesh and acoustic fiber fill to achieve a powerful resonant tone This muffler is made of durable corrosion resistant stainless steel and produced using cuttingedge CNC precision robotic manufacturing techniques all backed by MagnaFlows limited lifetime construction warranty