A 100% North American-Made product for the world of high performance! The all-new Street Flow line is now available in 409-grade stainless steel! Another premium option for any application that undergoes harsh weather conditions! The Street Flow Stainless line also features a ...A 100% North American-Made product for the world of high performance! The all-new Street Flow line is now available in 409-grade stainless steel! Another premium option for any application that undergoes harsh weather conditions! The Street Flow Stainless line also features a premium black powder coat finish for durability and longevity. The Two Chamber design delivers a moderate to aggressive rumble under deep acceleration, with an intermediate interior sound level.