The aFe Power Mach Force XP turbo downpipes are 100 percent TIG-welded and engineered to perform in the most extreme environments. They use a stepped design that increases exhaust velocity and eliminates low pressure dropswhich helps to scavenge the exhaust for increased intake charge and more power. The downpipes are constructed from ceramic coated 3 in. mandrel-bent 409 stainless steel tubing for maximum flow. Smooth transition bends allow for low turbulence, quicker turbo spool times, and lower EGTs. They're designed using a resonance chamber to reduce the in-cab resonance found with other downpipes. All hardware and brackets are included for a hassle-free installation. Order the model recommended for your vehicle.