Downpipes

Drop Exhaust Gas Temperatures (EGTs), improve turbo spool-up, and eliminate the most notorious exhaust restriction on your 2001–2004 Chevy Silverado or GMC Sierra 2500HD/3500HD with our selection of LB7 Duramax turbo downpipes. The factory downpipe is stamped with severe, flattened indentations to clear the firewall and transmission bellhousing, creating an extreme bottleneck right off the turbine outlet. Upgrading to a smooth, mandrel-bent 3-inch CNC-formed downpipe increases exhaust flow capacity, significantly lowers drive pressure behind the turbocharger, and helps your engine breathe effortlessly under heavy towing and aggressive tuning. We carry direct-fit stainless steel downpipes, ceramic-coated pipes, and heat-wrapped options from top brands like MBRP, PPE, and Diamond Eye designed to bolt directly to your factory turbo and aftermarket exhaust systems. Browse our LB7 turbo downpipes below to optimize your exhaust flow at the source.