aFe Mach Force XP 409 Stainless Steel Exhaust System, 5" DPF Back - NO MUFFLER - Black Tip - 11-16 GM Duramax LML - 49-44041-B

aFe's brand new in-house designed and manufactured Mach Force XP 409 stainless steel exhaust systems for diesel trucks!!! aFe Air Intake Systems and Filters are very good at getting air to your engine faster and more efficiently. However, we realize that it is important to get the air out as well. Just like anything else, the more you ingest, the more you need to expel, otherwise things can get clogged up. This is especially true in the diesel motor which is simply a huge air pump. Since diesel engines are a compression ignition engine and modern diesel-powered vehicles are turbocharged, the more air you pump in, the more power you generate. However, with turbocharged diesel, it is very important to get the hot exhaust out or the Exhaust Gas Temperature (EGT) will rise to critical level that could damage the turbo itself. Most OE manufacturers offer a restrictive 3" exhaust system which is fine for normal every day city or highway driving. But you bought a diesel truck for its towing or work capabilities, didn't you? If so, you want more power to go up that grade towing your boat, trailer or tools. Getting the air in will give you more power. Getting the air out will give you more power. When you get more air in and out at the same time, you get a lot more power.