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)

DmaxStore Note:

• *NOT LEGAL FOR SALE OR USE IN CALIFORNIA. THE MANUFACTURE, SALE, OFFER FOR SALE, OR INSTALLATION OF THIS PRODUCT MAY ALSO BE ILLEGAL NATIONWIDE UNDER THE FEDERAL CLEAN AIR ACT (42 U.S.C. § 7522(A)(3))*

• *This product is ONLY designed for closed course racing where it is legal to do so. Any other use will be in violation of local, state, and federal laws. We are not responsible for unlawful use of this product.

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