Magnaflow proudly manufactures all of their products in the USA using premium components and the latest technology. Their products range from direct-fit, DPF-back stainless steel systems to universal mufflers. As an ISO-9001 certified company they believe in thier product’s ability to perform and back it up with a lifetime warranty. They've designed their mufflers to have a free flowing, straight through design with a perforated stainless steel core, factory approved intercooled diesel DPF exhaust tips, mesh wrap and acoustical fiber fill to deliver that smooth, deep tone. Their mufflers are packed tight with the acoustic material to ensure long life and no sound degradation for your Dodge Cummins, Ford Powerstroke, and Chevy/GM Duramax diesel truck.