2017-2023 L5P/L5D Duramax Up-Pipe Kit by VSE Engineering

This kit can be used with factory or any L5P/L5D exhaust manifold. Gaskets included! - Direct bolt up and drop in. No Tuning required. These up pipes have been tested by Superflow equipment for a 28% gain in exhaust flow over OEM. Optional cerakote finish for a 200F reduction in temperature. ALL parts with the exception of the expansion bellows are made right here in the USA !

Features:

• Expansion bellows are upgraded stainless steel and made from high tensile strength 11 gauge 304 SS
• Exhaust flanges are machine tig welded. No human will lay a weld down better than these or yield higher strength or repeatability in weld process.
• Intake ports are 3D port matched and machined
• Pipe bends remain at 2" through the entire pipe run
• Choke points are eliminated
• Exhaust flange size increased to the manifold and turbo pedestal size of 1.765"
• Proven 5psi drop in drive pressure at maximum stock turbo exhaust flow
• Proven reduction in EGTs of 100F at maximum load (stock turbo)

*Replaces the following GM Part Numbers: 12688021, 12702943, 12681437, 12680270, 12681162, 12674813, 12681162, 12676611*