MagnaFlow was first and foremost developed to be a superior product line of performance mufflers. There is no other product that can offer the same deep and gratifying exhaust sound that a MagnaFlow muffler produces. This signature sound is achieved by flow-through internal designs, high-grade acoustical insulating materials and thick gauge stainless steel cores. As a result of these features, MagnaFlow mufflers have the highest exhaust flow rates and deliver the greatest quality and durability in the industry. Mario Andretti and Ivan "Iron Man" Stewart have joined the Magnaflow team and now stand along with them in supporting their conviction that MagnaFlow stands alone as the best looking and the top sounding performance muffler out there.