The Porter Muffler holds a unique place in the performance world. It is the original performance muffler, starting production in 1931, and remains the standard for performance, exhaust tone, and durability to this day. The original Porter Mufflers have been featured on professionally-built Riddler & AMBR contenders, high-end custom cars, the most rugged off-road trucks, and on Street Rods and Musclecars all over the world.