Fits: 2017 Thru 2023 Chevy Silverado/GMC Sierra 2500HD/3500HD L5P/ 2019 Thru 2023 L5D Chevy Silverado/GMC Sierra 4500HD/5500HD L5D Duramax Diesel

*Please call for availability*

*Allow 10-15 business days for processing from the manufacturer*

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)

• This kit works correctly with EGR and all emissions controls present for the 2017-2023 L5P/L5D

DmaxStore Note:

• *THE MANUFACTURE, SALE, OFFER FOR SALE, OR INSTALLATION OF THIS PRODUCT IS NOT LEGAL IN CALIFORNIA.*

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