HIGH FLOW EXHAUST MANIFOLD AND UPPIPES KIT SILVERADO/SIERRA 6.6L LML SILVER

High-Flow Exhaust Manifold and Up-Pipe Kit for 2011-2016 (LML) GM 6.6L Duramax. The PPE High-Flow Manifold is made from high-sil moly cast iron. The PPE Up-Pipe bellows are internally sleeved, made from aircraft-grade 304 stainless steel, and designed with increased inner diameter for higher flow. This exhaust system is designed to maximize power and flow characteristics, lower exhaust gas temperatures (EGTs), and accelerate turbo spool-up while increasing power, fuel economy, and maintaining reliability. Ceramic coating is available as an option for the High-Flow Exhaust Manifold, offering a thermal barrier and long-lasting protection against moisture, road salts, oil, fuel, and other corrosive chemicals. LML models may require modification on the upper control arm bushing heat shield.